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       <Question>hist: When was print invented in Europe?</Question>
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       <Question>hist: When did we land on the moon?</Question>
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       <Question>hist: What was the first electronic computer?</Question>
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       <Question>hist: The death of Jesus occurred about [BC/AD] 30</Question>
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       <Question>hist: Hiroshima was bombed on Aug 6, [...]</Question>
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       <Question>hist: When was Islam founded?</Question>
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       <Question>hist: In 1900 democracy scarcely existed. Only [...] countries had something that began to deserve the name</Question>
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       <Question>hist: When was Buddhism founded by Buddha?</Question>
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       <Question>hist: Who was the only scientist to receive Nobel Prize in two different scientific categories? (2001)</Question>
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       <Question>hist: What was the world's first mass-produced and mass-marketed product?</Question>
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       <Question>hist: What was Einstein's opinion on the world government?</Question>
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       <Question>hist: On Sept. 1, [...], Germany invaded Poland, forcing Britain and France to declare war</Question>
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       <Question>hist: Who was the most famous student of Plato's Athenian Academy?</Question>
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       <Question>hist: How many people died in WW1?</Question>
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       <Question>hist: Which year did Columbus discover America?</Question>
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       <Question>hist: What language was spoken in ancient Rome?</Question>
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       <Question>hist: As a result of the Great Depression, by 1932 US industrial output had been cut [...](%)</Question>
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       <Question>hist: Which year did Hitler attack Soviet Union?</Question>
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       <Question>hist: When did iron age begin?</Question>
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       <Question>hist: What was the main thought of Enlightenment (18th century)?</Question>
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       <Question>hist: By the Treaty of Versailles [...](country) was forced to acknowledge guilt for WW1</Question>
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       <Question>hist: When did bronze age begin with the first beaten cooper tools?</Question>
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       <Question>hist: What is the best evidence for the existence of Jesus Christ?</Question>
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       <Question>hist: What was the Roman Empire divided into from 395 AD?</Question>
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       <Question>hist: To escape capture by the Soviets Hitler [...] the night of April 30, 1945</Question>
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       <Question>hist: Which American president met Churchill and Stalin in Teheran (1943) and Yalta (1945)?</Question>
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       <Question>hist: In 1799 France came under the domination of [...](leader)</Question>
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       <Question>hist: Which English king executed two of his wives (for adultery)?</Question>
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       <Question>hist: Who established the structure of DNA's double helix?</Question>
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       <Question>hist: In a Hutu orchestrated effort, 800,000 Tutsis were killed in just 100 days in ...(country) in 1994</Question>
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       <Question>hist: Who founded Buddhism?</Question>
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       <Question>hist: Who showed that the universe is expanding?</Question>
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       <Question>hist: When did western Islamic science decline because of the reaction against rationalistic trends?</Question>
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       <Question>hist: What school is considered the first university ever?</Question>
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       <Question>hist: What date is considered the end of the Roman Empire (west)?</Question>
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       <Question>hist: Who developed the Arabic number system (based on a system first developed in India)?</Question>
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       <Question>hist: Did the Vikings reach Greenland in the Viking Age (800-1100)?</Question>
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       <Question>hist: On Sept. 1, 1939, Germany invaded Poland, forcing Britain and France to [...]</Question>
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       <Question>hist: When ...(famous leader) was 13 years old, the Greek philosopher Aristotle came to Macedon to tutor him</Question>
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       <Question>hist: ...(encyclopedia) set was first published in 1768 in Scotland</Question>
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       <Question>hist: How many people were killed in Auschwitz with hydrocyanic gas?</Question>
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     <Content>
       <Question>hist: Did the US ratify the Metric Convention of 1875?</Question>
       <Answer><![CDATA[<P>yes</P>]]></Answer>
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         <Interval>2531</Interval>
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     <Content>
       <Question>hist: How many deaths were caused by 1918 epidemic of influenza?</Question>
       <Answer>20 m</Answer>
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     <LearningData>
         <Interval>1151</Interval>
         <Repetitions>11</Repetitions>
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     <Content>
       <Question>hist: The negative aspects of Crusades: They hardened ...(religion) attitudes toward Christians</Question>
       <Answer>Muslim</Answer>
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         <Interval>990</Interval>
         <Repetitions>5</Repetitions>
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   <SuperMemoElement>
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     <Content>
       <Question>hist: When was the first car built?</Question>
       <Answer>1886 (Karl Benz)</Answer>
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     <LearningData>
         <Interval>310</Interval>
         <Repetitions>9</Repetitions>
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     <Content>
       <Question>hist: On June 6, 1944, 150,000 allied troops disembarked at ...(place) to open the western front in WW2</Question>
       <Answer>Normandy</Answer>
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     <LearningData>
         <Interval>1121</Interval>
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     <Content>
       <Question>hist: The Crusades were Christian military expeditions undertaken in the 11th-14th centuries to recapture the Holy Land from the ...</Question>
       <Answer>Muslims</Answer>
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     <LearningData>
         <Interval>1152</Interval>
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   <SuperMemoElement>
     <ElementID>40406</ElementID>
     <Content>
       <Question>hist: How old is the written language?</Question>
       <Answer>5,000 years</Answer>
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     <LearningData>
         <Interval>126</Interval>
         <Repetitions>16</Repetitions>
         <Lapses>7</Lapses>
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   <SuperMemoElement>
     <ElementID>40619</ElementID>
     <Content>
       <Question>hist: When were steam-boat and steam-locomotive constructed?</Question>
       <Answer>beginning of 19-th century (1807 - steam-boat; 1825 - steam-railway)</Answer>
     </Content>
     <LearningData>
         <Interval>968</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>7</Lapses>
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   <SuperMemoElement>
     <ElementID>140627</ElementID>
     <Content>
       <Question>hist: In 1947 [...](territory) was partitioned between the new state of Israel and Jordan</Question>
       <Answer>Palestine</Answer>
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     <LearningData>
         <Interval>678</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>73176</ElementID>
     <Content>
       <Question>hist: Between 1500 and 1870, an estimated ... slaves left Africa</Question>
       <Answer>10 million</Answer>
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     <LearningData>
         <Interval>1059</Interval>
         <Repetitions>1</Repetitions>
         <Lapses>1</Lapses>
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   <SuperMemoElement>
     <ElementID>40482</ElementID>
     <Content>
       <Question>hist: What is considered the historic cradle of science?</Question>
       <Answer>ancient Greece (6th century BC; Thales of Miletus)</Answer>
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     <LearningData>
         <Interval>1243</Interval>
         <Repetitions>4</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>64640</ElementID>
     <Content>
       <Question>hist: In 1941, Hitler's three pronged attack against the USSR targeted: Leningrad in the north, Moscow in the middle and ... in the south</Question>
       <Answer>Stalingrad</Answer>
     </Content>
     <LearningData>
         <Interval>666</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>25.01.2003</LastRepetition>
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   <SuperMemoElement>
     <ElementID>83040</ElementID>
     <Content>
       <Question>hist: [...](city) was A-bombed on Aug 6, 1945</Question>
       <Answer>Hiroshima</Answer>
     </Content>
     <LearningData>
         <Interval>1168</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>27.12.2000</LastRepetition>
         <AFactor>6.237</AFactor>
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   <SuperMemoElement>
     <ElementID>40632</ElementID>
     <Content>
       <Question>hist: When did Yuri Gagarin orbit the earth in Vostok?</Question>
       <Answer>1961 (Apr 12)</Answer>
     </Content>
     <LearningData>
         <Interval>1121</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>77460</ElementID>
     <Content>
       <Question>hist: One of the most valuable patents ever granted was the one given to Alexander Graham Bell in March 1876 for his invention of the [...]</Question>
       <Answer>telephone</Answer>
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     <LearningData>
         <Interval>852</Interval>
         <Repetitions>4</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>27.10.2001</LastRepetition>
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   <SuperMemoElement>
     <ElementID>40509</ElementID>
     <Content>
       <Question>hist: Who discovered X-rays?</Question>
       <Answer>Wilhelm Roentgen (1895)</Answer>
     </Content>
     <LearningData>
         <Interval>1179</Interval>
         <Repetitions>10</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>27.10.2001</LastRepetition>
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   <SuperMemoElement>
     <ElementID>74897</ElementID>
     <Content>
       <Question>hist: China invented paper about ... years before the idea reached the West</Question>
       <Answer>1,000</Answer>
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     <LearningData>
         <Interval>886</Interval>
         <Repetitions>6</Repetitions>
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   <SuperMemoElement>
     <ElementID>40584</ElementID>
     <Content>
       <Question>hist: Who invented and sold the first calculating machine in 1645?</Question>
       <Answer>Blaise Pascal</Answer>
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     <LearningData>
         <Interval>1662</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>147841</ElementID>
     <Content>
       <Question>hist: Beginning in [...](country) during the 14th century there was a rebirth of culture and learning referred to as the Renaissance</Question>
       <Answer>Italy</Answer>
     </Content>
     <LearningData>
         <Interval>553</Interval>
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         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>63817</ElementID>
     <Content>
       <Question>hist: In what language did Copernicus write his works (1473-1543)?</Question>
       <Answer>Latin</Answer>
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     <LearningData>
         <Interval>2094</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>108576</ElementID>
     <Content>
       <Question>hist: F.D. Roosevelt (1882-1945): president (1933-45) led the US through two of the greatest crises of the 20th century: the [...]  and World War II</Question>
       <Answer>Great Depression</Answer>
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     <LearningData>
         <Interval>942</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>16.07.2001</LastRepetition>
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   <SuperMemoElement>
     <ElementID>59540</ElementID>
     <Content>
       <Question>hist: During the four year rule of Pol Pot in Cambodia (1975-1979), ...% of its population was wiped out: 1.7 million people</Question>
       <Answer>25%</Answer>
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     <LearningData>
         <Interval>979</Interval>
         <Repetitions>15</Repetitions>
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   <SuperMemoElement>
     <ElementID>40533</ElementID>
     <Content>
       <Question>hist: When was the independent state of Israel declared?</Question>
       <Answer>1948</Answer>
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     <LearningData>
         <Interval>1222</Interval>
         <Repetitions>10</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>40528</ElementID>
     <Content>
       <Question>hist: How old is education?</Question>
       <Answer>5,000 years (it originated in the 3rd millennium BC in Egypt and Sumer)</Answer>
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     <LearningData>
         <Interval>495</Interval>
         <Repetitions>9</Repetitions>
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   <SuperMemoElement>
     <ElementID>64677</ElementID>
     <Content>
       <Question>hist: Who won the Vietnam War in 1975?</Question>
       <Answer>North/communists</Answer>
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     <LearningData>
         <Interval>1433</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>40415</ElementID>
     <Content>
       <Question>hist: Who invented the bulb?</Question>
       <Answer>Edison</Answer>
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     <LearningData>
         <Interval>2522</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>40673</ElementID>
     <Content>
       <Question>hist: Who was the first to cross the Atlantic by plane (1927)?</Question>
       <Answer>Charles Lindbergh</Answer>
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     <LearningData>
         <Interval>1407</Interval>
         <Repetitions>5</Repetitions>
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   <SuperMemoElement>
     <ElementID>40500</ElementID>
     <Content>
       <Question>hist: Which famous work was put on the Index of Forbidden Books in 1616 by Roman Catholic Church?</Question>
       <Answer>Nicolaus Copernicus's "De revolutionibus orbium coelestium" (On the Revolutions of the Heavenly Spheres; 1543)</Answer>
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         <Interval>1307</Interval>
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   <SuperMemoElement>
     <ElementID>40467</ElementID>
     <Content>
       <Question>hist: When did the state of Tennessee forbade the teaching of Charles Darwin's theory of evolution?</Question>
       <Answer>the 1920s (exactly: 1925)</Answer>
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     <LearningData>
         <Interval>1331</Interval>
         <Repetitions>11</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>63904</ElementID>
     <Content>
       <Question>hist: On what day did WW2 in Europe end?</Question>
       <Answer>May 9, 1945 (capitulation of Germany)</Answer>
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     <LearningData>
         <Interval>1163</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>40538</ElementID>
     <Content>
       <Question>hist: What were the reasons for the fall of the ancient Roman Empire?</Question>
       <Answer>combination of human weaknesses (e.g. war, greed, fight for power, mismanagement, slavery, etc.)</Answer>
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     <LearningData>
         <Interval>1268</Interval>
         <Repetitions>10</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>40462</ElementID>
     <Content>
       <Question>hist: Why could not David Hume get his professorship?</Question>
       <Answer>because of his atheism</Answer>
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     <LearningData>
         <Interval>1384</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>27.05.2000</LastRepetition>
         <AFactor>6.485</AFactor>
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   <SuperMemoElement>
     <ElementID>108719</ElementID>
     <Content>
       <Question>hist: Most Catholics in Northern Ireland consider themselves to be [Irish/British]</Question>
       <Answer><![CDATA[<P>Irish</P>]]></Answer>
     </Content>
     <LearningData>
         <Interval>999</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
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         <AFactor>3.503</AFactor>
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   <SuperMemoElement>
     <ElementID>79799</ElementID>
     <Content>
       <Question>hist: The oldest known cave paintings are [...] years old</Question>
       <Answer>35,000</Answer>
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     <LearningData>
         <Interval>192</Interval>
         <Repetitions>1</Repetitions>
         <Lapses>4</Lapses>
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   <SuperMemoElement>
     <ElementID>88862</ElementID>
     <Content>
       <Question>hist: By 1241, the [...] had conquered all of northern China</Question>
       <Answer>Mongols</Answer>
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     <LearningData>
         <Interval>1091</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>86908</ElementID>
     <Content>
       <Question>hist: In 476 the Roman Empire was at an end, but the Eastern, or Byzantine, Empire lasted another [...] years</Question>
       <Answer>1,000</Answer>
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     <LearningData>
         <Interval>996</Interval>
         <Repetitions>1</Repetitions>
         <Lapses>2</Lapses>
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   <SuperMemoElement>
     <ElementID>211406</ElementID>
     <Content>
       <Question>hist: On June 28, 1914, Archduke Francis Ferdinand of Austria-Hungary was [...]</Question>
       <Answer>assassinated</Answer>
     </Content>
     <LearningData>
         <Interval>88</Interval>
         <Repetitions>2</Repetitions>
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   <SuperMemoElement>
     <ElementID>57239</ElementID>
     <Content>
       <Question>hist: Who was the first emperor of Rome (27 BC - 14 AD)?</Question>
       <Answer>Augustus (born as Gaius Octavius aka Octavian)</Answer>
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     <LearningData>
         <Interval>1005</Interval>
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   <SuperMemoElement>
     <ElementID>40551</ElementID>
     <Content>
       <Question>hist: Was Einstein a brilliant student?</Question>
       <Answer>he was not</Answer>
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     <LearningData>
         <Interval>1300</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>38732</ElementID>
     <Content>
       <Question>hist: In which year did Austria, Finland and Sweden joined the European Union?</Question>
       <Answer>1995</Answer>
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     <LearningData>
         <Interval>1452</Interval>
         <Repetitions>9</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>24.10.2003</LastRepetition>
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   <SuperMemoElement>
     <ElementID>106736</ElementID>
     <Content>
       <Question>hist: The US gained independence on [...](day of month) July 1776 from England</Question>
       <Answer>4</Answer>
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     <LearningData>
         <Interval>790</Interval>
         <Repetitions>3</Repetitions>
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   <SuperMemoElement>
     <ElementID>76346</ElementID>
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       <Question>hist: The US has gained independence from England on 4 July [...](year)</Question>
       <Answer>1776</Answer>
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         <Repetitions>1</Repetitions>
         <Lapses>2</Lapses>
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     <ElementID>38086</ElementID>
     <Content>
       <Question>hist: What is an example of a worldwide-popular invention that came too early and made the pioneer bankrupt?</Question>
       <Answer>ATM (1962, The People's National Bank)</Answer>
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     <LearningData>
         <Interval>436</Interval>
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         <Lapses>1</Lapses>
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     <ElementID>40540</ElementID>
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       <Question>hist: What did Muhammad establish in early 7th century?</Question>
       <Answer>religion of Islam</Answer>
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     <LearningData>
         <Interval>1319</Interval>
         <Repetitions>9</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>69069</ElementID>
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       <Question>hist: Islamic science achieved great sophistication up until around ...(year), and then came almost to a halt</Question>
       <Answer>1200 AD</Answer>
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         <Interval>1226</Interval>
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   <SuperMemoElement>
     <ElementID>40502</ElementID>
     <Content>
       <Question>hist: When was the first microscope constructed?</Question>
       <Answer>about 1600 (probably Hans and Zacharias Jannsen were first to construct it)(Galileo is considered the inventor though)</Answer>
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     <LearningData>
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   <SuperMemoElement>
     <ElementID>67269</ElementID>
     <Content>
       <Question>hist: The First ...(military mission) was launched by Pope Urban II in a speech at the Council of Clermont, France, on Nov.  27, 1095</Question>
       <Answer>Crusade</Answer>
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     <LearningData>
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   <SuperMemoElement>
     <ElementID>145847</ElementID>
     <Content>
       <Question>hist: In 1982, right-wing [...](nationality) Christian militiamen entered Palestinian refugee camps of Sabra and Shatila and massacred hundreds of Palestinians</Question>
       <Answer>Lebanese</Answer>
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     <LearningData>
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         <Lapses>1</Lapses>
         <LastRepetition>30.10.2003</LastRepetition>
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   <SuperMemoElement>
     <ElementID>64435</ElementID>
     <Content>
       <Question>hist: Who won the 6-day war between Israel and Egypt in 1967?</Question>
       <Answer>Israel (Egypt was humiliated)</Answer>
     </Content>
     <LearningData>
         <Interval>1382</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
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         <AFactor>6.739</AFactor>
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   <SuperMemoElement>
     <ElementID>73652</ElementID>
     <Content>
       <Question>hist: When Alexander the Great was 13 years old, the Greek philosopher ...(name) came to Macedon to tutor him</Question>
       <Answer>Aristotle</Answer>
     </Content>
     <LearningData>
         <Interval>627</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>01.06.2002</LastRepetition>
         <AFactor>4.246</AFactor>
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   <SuperMemoElement>
     <ElementID>211402</ElementID>
     <Content>
       <Question>hist: On June 28, [...], Archduke Francis Ferdinand of Austria-Hungary was assassinated</Question>
       <Answer>1914</Answer>
     </Content>
     <LearningData>
         <Interval>106</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>27.10.2003</LastRepetition>
         <AFactor>6.315</AFactor>
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   <SuperMemoElement>
     <ElementID>64616</ElementID>
     <Content>
       <Question>hist: In 1933, Hitler took Germany out of the League of Nations and started an open rearmament in defiance of the ...</Question>
       <Answer>Versailles Treaty</Answer>
     </Content>
     <LearningData>
         <Interval>991</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>10.06.2001</LastRepetition>
         <AFactor>6.476</AFactor>
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   <SuperMemoElement>
     <ElementID>110322</ElementID>
     <Content>
       <Question>hist: Rabin, [...] and Peres won the 1994 Nobel Peace Prize</Question>
       <Answer>Arafat</Answer>
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     <LearningData>
         <Interval>960</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>14.07.2001</LastRepetition>
         <AFactor>6.268</AFactor>
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   <SuperMemoElement>
     <ElementID>57240</ElementID>
     <Content>
       <Question>hist: What event made Augustus the sole ruler of Rome in the year 30 BC?</Question>
       <Answer>death of Mark Antony (by suicide along with Cleopatra VII)</Answer>
     </Content>
     <LearningData>
         <Interval>1763</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>1</Lapses>
         <LastRepetition>30.04.2003</LastRepetition>
         <AFactor>6.657</AFactor>
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   <SuperMemoElement>
     <ElementID>9667</ElementID>
     <Content>
       <Question>hist: ... (356-323 BC) conquered almost all the then known world and gave a new direction to history</Question>
       <Answer>Alexander the Great</Answer>
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     <LearningData>
         <Interval>744</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>22.07.2003</LastRepetition>
         <AFactor>4.165</AFactor>
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   <SuperMemoElement>
     <ElementID>63723</ElementID>
     <Content>
       <Question>hist: Who founded the People's Republic of China in 1949?</Question>
       <Answer>Mao Tse-tung</Answer>
     </Content>
     <LearningData>
         <Interval>950</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>30.07.2001</LastRepetition>
         <AFactor>3.136</AFactor>
     </LearningData>
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   <SuperMemoElement>
     <ElementID>40606</ElementID>
     <Content>
       <Question>hist: Who was first to notice that human population growth is exponential?</Question>
       <Answer>Thomas Malthus (in his Essay on the Principle of Population; 1798;  rev. 1803)</Answer>
     </Content>
     <LearningData>
         <Interval>1552</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>18.11.1999</LastRepetition>
         <AFactor>3.257</AFactor>
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   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>57269</ElementID>
     <Content>
       <Question>hist: Which year did Titanic sink?</Question>
       <Answer>1912</Answer>
     </Content>
     <LearningData>
         <Interval>1528</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>19.12.1999</LastRepetition>
         <AFactor>6.739</AFactor>
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   <SuperMemoElement>
     <ElementID>40452</ElementID>
     <Content>
       <Question>hist: What is the supreme goal in positive religion of Auguste Comte?</Question>
       <Answer>progress of humanity</Answer>
     </Content>
     <LearningData>
         <Interval>1240</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>08.10.2000</LastRepetition>
         <AFactor>6.568</AFactor>
     </LearningData>
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   <SuperMemoElement>
     <ElementID>40577</ElementID>
     <Content>
       <Question>hist: Why did Mendel stop his revolutionary experiments?</Question>
       <Answer>because of promotion (to abbot of the monastery)</Answer>
     </Content>
     <LearningData>
         <Interval>1408</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>15.04.2000</LastRepetition>
         <AFactor>2.991</AFactor>
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   <SuperMemoElement>
     <ElementID>57217</ElementID>
     <Content>
       <Question>hist: Who was the tutor to the young emperor Nero?</Question>
       <Answer>Seneca</Answer>
     </Content>
     <LearningData>
         <Interval>1373</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>02.05.2000</LastRepetition>
         <AFactor>5.791</AFactor>
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   <SuperMemoElement>
     <ElementID>128832</ElementID>
     <Content>
       <Question>hist: On Sept. 1, 1939, [...](country) invaded Poland, forcing Britain and France to declare war</Question>
       <Answer><![CDATA[<P>Germany</P>]]></Answer>
     </Content>
     <LearningData>
         <Interval>670</Interval>
         <Repetitions>4</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>23.04.2002</LastRepetition>
         <AFactor>5.413</AFactor>
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   <SuperMemoElement>
     <ElementID>109848</ElementID>
     <Content>
       <Question>hist: Dec 23, [...]: For the first time, the number of adults in the U.S. who use the Internet has surpassed the number of U.S. adults who do not</Question>
       <Answer>1999</Answer>
     </Content>
     <LearningData>
         <Interval>959</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>04.07.2001</LastRepetition>
         <AFactor>6.212</AFactor>
     </LearningData>
   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>40623</ElementID>
     <Content>
       <Question>hist: When did the first airplane flight take place?</Question>
       <Answer>1903 (Wright brothers)</Answer>
     </Content>
     <LearningData>
         <Interval>1262</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>23.08.2000</LastRepetition>
         <AFactor>3.933</AFactor>
     </LearningData>
   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>40453</ElementID>
     <Content>
       <Question>hist: Who attacked religion as the ideology of the capitalist class?</Question>
       <Answer>Karl Marx (1818-1883)</Answer>
     </Content>
     <LearningData>
         <Interval>1052</Interval>
         <Repetitions>9</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>23.04.2001</LastRepetition>
         <AFactor>4.986</AFactor>
     </LearningData>
   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>40428</ElementID>
     <Content>
       <Question>hist: Who developed the first film camera?</Question>
       <Answer>Edison (1891)</Answer>
     </Content>
     <LearningData>
         <Interval>1768</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>05.04.1999</LastRepetition>
         <AFactor>5.252</AFactor>
     </LearningData>
   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>40671</ElementID>
     <Content>
       <Question>hist: Which president held office during the American Civil War in 1861?</Question>
       <Answer>Abraham Lincoln</Answer>
     </Content>
     <LearningData>
         <Interval>1180</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>27.04.2003</LastRepetition>
         <AFactor>4.357</AFactor>
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   <SuperMemoElement>
     <ElementID>64606</ElementID>
     <Content>
       <Question>hist: On November 19, ..., Soviet forces under Gen. Georgy Zhukov attacked north and south of Stalingrad, encircling the Germans</Question>
       <Answer>1942</Answer>
     </Content>
     <LearningData>
         <Interval>317</Interval>
         <Repetitions>4</Repetitions>
         <Lapses>2</Lapses>
         <LastRepetition>12.04.2003</LastRepetition>
         <AFactor>4.077</AFactor>
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   <SuperMemoElement>
     <ElementID>64852</ElementID>
     <Content>
       <Question>hist: How many times was Richard Nixon elected president?</Question>
       <Answer>twice (in office from 1969 to 1974)</Answer>
     </Content>
     <LearningData>
         <Interval>1059</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>15.03.2001</LastRepetition>
         <AFactor>2.956</AFactor>
     </LearningData>
   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>64243</ElementID>
     <Content>
       <Question>hist: When was East and West Germany unified (under Helmut Kohl)?</Question>
       <Answer>1990</Answer>
     </Content>
     <LearningData>
         <Interval>1258</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>1</Lapses>
         <LastRepetition>24.08.2000</LastRepetition>
         <AFactor>4.171</AFactor>
     </LearningData>
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   <SuperMemoElement>
     <ElementID>41991</ElementID>
     <Content>
       <Question>hist: When was computer keyboard first used?</Question>
       <Answer>1956</Answer>
     </Content>
     <LearningData>
         <Interval>1219</Interval>
         <Repetitions>11</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>11.10.2000</LastRepetition>
         <AFactor>3.661</AFactor>
     </LearningData>
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   <SuperMemoElement>
     <ElementID>39507</ElementID>
     <Content>
       <Question>hist: In which year was Unix developed?</Question>
       <Answer>1969</Answer>
     </Content>
     <LearningData>
         <Interval>1095</Interval>
         <Repetitions>4</Repetitions>
         <Lapses>1</Lapses>
         <LastRepetition>15.03.2001</LastRepetition>
         <AFactor>4.989</AFactor>
     </LearningData>
   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>42002</ElementID>
     <Content>
       <Question>hist: Who invented the radio?</Question>
       <Answer>Tesla (even though Marconi got Nobel Prize for it in 1909)</Answer>
     </Content>
     <LearningData>
         <Interval>1136</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>01.09.2001</LastRepetition>
         <AFactor>3.834</AFactor>
     </LearningData>
   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>64201</ElementID>
     <Content>
       <Question>hist: Who poisoned Claudius (54 AD)?</Question>
       <Answer>probably his wife (Agrippina)</Answer>
     </Content>
     <LearningData>
         <Interval>1072</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>12.03.2001</LastRepetition>
         <AFactor>4.800</AFactor>
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   <SuperMemoElement>
     <ElementID>40426</ElementID>
     <Content>
       <Question>hist: When was the electric bulb invented?</Question>
       <Answer>1879</Answer>
     </Content>
     <LearningData>
         <Interval>1103</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>2</Lapses>
         <LastRepetition>28.02.2001</LastRepetition>
         <AFactor>3.883</AFactor>
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   <SuperMemoElement>
     <ElementID>64129</ElementID>
     <Content>
       <Question>hist: Which year was the transistor developed?</Question>
       <Answer>1947 (W. Shockley)</Answer>
     </Content>
     <LearningData>
         <Interval>100</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>6</Lapses>
         <LastRepetition>28.10.2003</LastRepetition>
         <AFactor>2.985</AFactor>
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   <SuperMemoElement>
     <ElementID>82549</ElementID>
     <Content>
       <Question>hist: Great Depression: On Oct. 24, [...], the complete collapse of the stock market began</Question>
       <Answer>1929</Answer>
     </Content>
     <LearningData>
         <Interval>975</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>29.06.2001</LastRepetition>
         <AFactor>6.322</AFactor>
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   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>40497</ElementID>
     <Content>
       <Question>hist: Who discovered Milky Way as a collection of stars (rather than a stream of light)?</Question>
       <Answer>Galileo (1609)</Answer>
     </Content>
     <LearningData>
         <Interval>444</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>1</Lapses>
         <LastRepetition>18.05.2003</LastRepetition>
         <AFactor>2.369</AFactor>
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   <SuperMemoElement>
     <ElementID>29386</ElementID>
     <Content>
       <Question>hist: Israelite religion was shaped under Hebrew prophet and lawgiver Moses about [...] BC</Question>
       <Answer>1300</Answer>
     </Content>
     <LearningData>
         <Interval>753</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>02.02.2002</LastRepetition>
         <AFactor>6.315</AFactor>
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   <SuperMemoElement>
     <ElementID>64614</ElementID>
     <Content>
       <Question>hist: In 1933, Hitler took ...(country) out of the League of Nations and started open rearmament in defiance of the Versailles Treaty</Question>
       <Answer><![CDATA[<P>Germany</P>]]></Answer>
     </Content>
     <LearningData>
         <Interval>1140</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>19.01.2001</LastRepetition>
         <AFactor>6.795</AFactor>
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   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>123529</ElementID>
     <Content>
       <Question>hist: Tea was used in China as early as [...] years ago</Question>
       <Answer>5000</Answer>
     </Content>
     <LearningData>
         <Interval>847</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>11.11.2001</LastRepetition>
         <AFactor>6.255</AFactor>
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   <SuperMemoElement>
     <ElementID>40545</ElementID>
     <Content>
       <Question>hist: Who noticed that despite the egoistic nature of businessmen, they all serve the social cause (even though they seldom meet to talk)?</Question>
       <Answer>Adam Smith</Answer>
     </Content>
     <LearningData>
         <Interval>1276</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>25.08.2000</LastRepetition>
         <AFactor>5.896</AFactor>
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   <SuperMemoElement>
     <ElementID>40469</ElementID>
     <Content>
       <Question>hist: Who is reputed to be the greatest inventor ever?</Question>
       <Answer>Thomas Edison (over 1000 patents)</Answer>
     </Content>
     <LearningData>
         <Interval>1291</Interval>
         <Repetitions>10</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>06.09.2001</LastRepetition>
         <AFactor>4.209</AFactor>
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   <SuperMemoElement>
     <ElementID>143518</ElementID>
     <Content>
       <Question>hist: In 387 BC Plato, who had studied under [...], established a school in Athens called the Academy</Question>
       <Answer>Socrates</Answer>
     </Content>
     <LearningData>
         <Interval>650</Interval>
         <Repetitions>1</Repetitions>
         <Lapses>1</Lapses>
         <LastRepetition>21.05.2002</LastRepetition>
         <AFactor>3.094</AFactor>
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   <SuperMemoElement>
     <ElementID>40408</ElementID>
     <Content>
       <Question>hist: What two theories revolutionized physics in the 20-th century?</Question>
       <Answer><![CDATA[theory of relativity <br>quantum theory]]></Answer>
     </Content>
     <LearningData>
         <Interval>859</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>15.10.2001</LastRepetition>
         <AFactor>2.605</AFactor>
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   <SuperMemoElement>
     <ElementID>87299</ElementID>
     <Content>
       <Question>hist: World War I ([...]-1918), also known as the Great War, conflict, chiefly in Europe, among most of the great Western powers</Question>
       <Answer>1914</Answer>
     </Content>
     <LearningData>
         <Interval>731</Interval>
         <Repetitions>3</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>26.02.2002</LastRepetition>
         <AFactor>6.479</AFactor>
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   <SuperMemoElement>
     <ElementID>107192</ElementID>
     <Content>
       <Question>hist: [...] declared war on Serbia on July 28, 1914 to start WW1</Question>
       <Answer>Austria-Hungary</Answer>
     </Content>
     <LearningData>
         <Interval>980</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>12.06.2001</LastRepetition>
         <AFactor>6.232</AFactor>
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   <SuperMemoElement>
     <ElementID>40640</ElementID>
     <Content>
       <Question>hist: When was surgical removal of kidney stones first practised in ancient India?</Question>
       <Answer>5th century BC (Indian physician Susruta)</Answer>
     </Content>
     <LearningData>
         <Interval>1105</Interval>
         <Repetitions>9</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>04.06.2001</LastRepetition>
         <AFactor>4.122</AFactor>
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   <SuperMemoElement>
     <ElementID>73928</ElementID>
     <Content>
       <Question>hist: In ...(country), a bloody military coup of 1973 led by Pinochet toppled Marxist President Salvador Allende</Question>
       <Answer>Chile</Answer>
     </Content>
     <LearningData>
         <Interval>1232</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>12.10.2000</LastRepetition>
         <AFactor>6.739</AFactor>
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   <SuperMemoElement>
     <ElementID>83036</ElementID>
     <Content>
       <Question>hist: Hiroshima was bombed on [...], 1945 and Nagasaki 3 days later</Question>
       <Answer>Aug 6</Answer>
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     <LearningData>
         <Interval>1289</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>23.08.2000</LastRepetition>
         <AFactor>4.006</AFactor>
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   <SuperMemoElement>
     <ElementID>73930</ElementID>
     <Content>
       <Question>hist: Chile enjoyed democracy until 1973, when a military coup led by ... toppled Salvador Allende</Question>
       <Answer>(General Augusto) Pinochet</Answer>
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     <LearningData>
         <Interval>1122</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>30.01.2001</LastRepetition>
         <AFactor>6.739</AFactor>
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   <SuperMemoElement>
     <ElementID>40474</ElementID>
     <Content>
       <Question>hist: Which French philosopher argued that the adoption of scientific attitude was necessary for social revival?</Question>
       <Answer>Auguste Comte</Answer>
     </Content>
     <LearningData>
         <Interval>1117</Interval>
         <Repetitions>11</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>28.01.2001</LastRepetition>
         <AFactor>5.332</AFactor>
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   <SuperMemoElement>
     <ElementID>40433</ElementID>
     <Content>
       <Question>hist: How many people died in the course of WW2?</Question>
       <Answer>30 million (some sources claim far higher numbers)</Answer>
     </Content>
     <LearningData>
         <Interval>923</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>02.08.2002</LastRepetition>
         <AFactor>2.288</AFactor>
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   <SuperMemoElement>
     <ElementID>84572</ElementID>
     <Content>
       <Question>hist: The successful cloning of Dolly the sheep was announced in [...]</Question>
       <Answer>1997</Answer>
     </Content>
     <LearningData>
         <Interval>1098</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>1</Lapses>
         <LastRepetition>18.02.2001</LastRepetition>
         <AFactor>4.822</AFactor>
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   <SuperMemoElement>
     <ElementID>67477</ElementID>
     <Content>
       <Question>hist: ...(spaceship name) made the first manned lunar landing on July 20, 1969. M. Collins orbited the Moon in the mother ship Columbia</Question>
       <Answer>Apollo 11</Answer>
     </Content>
     <LearningData>
         <Interval>1332</Interval>
         <Repetitions>4</Repetitions>
         <Lapses>2</Lapses>
         <LastRepetition>09.07.2000</LastRepetition>
         <AFactor>3.374</AFactor>
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   <SuperMemoElement>
     <ElementID>40657</ElementID>
     <Content>
       <Question>hist: What is a good example of a long-drawn and costly process of adopting an obviously superior standard?</Question>
       <Answer>metric system in the US (Metric Convention ratified already in 1875)</Answer>
     </Content>
     <LearningData>
         <Interval>1306</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>2</Lapses>
         <LastRepetition>16.07.2000</LastRepetition>
         <AFactor>6.409</AFactor>
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   <SuperMemoElement>
     <ElementID>74849</ElementID>
     <Content>
       <Question>hist: Did the bill of rights attached to the constitution of the USA in 1789 guarantee the right to be taught to read and write?</Question>
       <Answer>no</Answer>
     </Content>
     <LearningData>
         <Interval>868</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>27.10.2001</LastRepetition>
         <AFactor>3.935</AFactor>
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     <ElementID>67313</ElementID>
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       <Question>hist: The ...(people) were seafarers from Scandinavia who spread through Europe and the North Atlantic in 800-1100</Question>
       <Answer>Vikings</Answer>
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         <Interval>938</Interval>
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     <ElementID>64656</ElementID>
     <Content>
       <Question>hist: On June 6, ..., 150,000 allied troops disembarked at Normandy to open the western front in WW2</Question>
       <Answer><![CDATA[<A class=internal title=1944 href="http://www.wikipedia.org/wiki/1944">1944</A>]]></Answer>
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       <Question>hist: On December 12, 1901, Marconi for the first time transmitted and received signals [...](distance)</Question>
       <Answer>across the Atlantic</Answer>
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         <Interval>636</Interval>
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   <SuperMemoElement>
     <ElementID>41842</ElementID>
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       <Question>hist: Which language was Old Testament written in (mostly)?</Question>
       <Answer>Hebrew</Answer>
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       <Question>hist: Alexander the Great (356-323 BC). Although he died before the age of ..., he conquered almost all the then known world</Question>
       <Answer>33</Answer>
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         <Interval>614</Interval>
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     <ElementID>63361</ElementID>
     <Content>
       <Question>hist: How many times was Franklin Delano Roosevelt elected president?</Question>
       <Answer>four (1933-1945; he died at the beginning of his fourth term)</Answer>
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     <LearningData>
         <Interval>1192</Interval>
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       <Question>hist: When was Plato's Academy established?</Question>
       <Answer>4th century BC</Answer>
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         <Interval>1092</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>2</Lapses>
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   <SuperMemoElement>
     <ElementID>40526</ElementID>
     <Content>
       <Question>hist: Who developed Esperanto?</Question>
       <Answer>Ludwik Zamenhof (1887)</Answer>
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     <LearningData>
         <Interval>1385</Interval>
         <Repetitions>8</Repetitions>
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   <SuperMemoElement>
     <ElementID>40507</ElementID>
     <Content>
       <Question>hist: Who developed the concept of entropy?</Question>
       <Answer>Rudolf Julius Emmanuel Clausius (German, b. 1822)</Answer>
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     <LearningData>
         <Interval>1010</Interval>
         <Repetitions>7</Repetitions>
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   <SuperMemoElement>
     <ElementID>40475</ElementID>
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       <Question>hist: Who envisioned a society governed by a scientific elite who would use the methods of science to solve human problems?</Question>
       <Answer>Auguste Comte</Answer>
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     <LearningData>
         <Interval>1103</Interval>
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   <SuperMemoElement>
     <ElementID>40457</ElementID>
     <Content>
       <Question>hist: What famous physicist took part in framing the Declaration of Independence (1775)?</Question>
       <Answer><![CDATA[<I><FONT color=#008080><br><P>Benjamin Franklin (1706-1790)</P></I></FONT>]]></Answer>
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         <Interval>1147</Interval>
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   <SuperMemoElement>
     <ElementID>73323</ElementID>
     <Content>
       <Question>hist: What is the first name of pastor King assassinated in Memphis?</Question>
       <Answer>Martin Luther</Answer>
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     <LearningData>
         <Interval>1157</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>80970</ElementID>
     <Content>
       <Question>hist: In 1980, only 37 countries were democracies (35% of the world's population). By 1998, 117 of the countries were democratic ([...]% of the world's population)</Question>
       <Answer>54</Answer>
     </Content>
     <LearningData>
         <Interval>896</Interval>
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   <SuperMemoElement>
     <ElementID>59539</ElementID>
     <Content>
       <Question>hist: During the four year rule of Pol Pot in ...(country), 25% of its population was wiped out (1.7 m people)</Question>
       <Answer>Cambodia</Answer>
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     <LearningData>
         <Interval>1172</Interval>
         <Repetitions>7</Repetitions>
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   <SuperMemoElement>
     <ElementID>64438</ElementID>
     <Content>
       <Question>hist: When did Israel gain the control over Gaza?</Question>
       <Answer>during six-day war (1967)</Answer>
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         <Interval>1128</Interval>
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   <SuperMemoElement>
     <ElementID>40572</ElementID>
     <Content>
       <Question>hist: How old was Niels Bohr when he developed his theory of the atom (1885-1962)?</Question>
       <Answer>28 (in 1913)</Answer>
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     <LearningData>
         <Interval>1076</Interval>
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   <SuperMemoElement>
     <ElementID>64839</ElementID>
     <Content>
       <Question>hist: Does Switzerland belong to the EU (2004)?</Question>
       <Answer>no</Answer>
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     <LearningData>
         <Interval>1072</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>140473</ElementID>
     <Content>
       <Question>hist: Socrates (469-399 BC) profoundly affected Western philosophy through his influence on [...](student)</Question>
       <Answer>Plato</Answer>
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   <SuperMemoElement>
     <ElementID>40668</ElementID>
     <Content>
       <Question>hist: What was the name of the 1861-1865 war between 11 Southern states and the US Federal government?</Question>
       <Answer>(American) Civil War</Answer>
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     <LearningData>
         <Interval>1087</Interval>
         <Repetitions>7</Repetitions>
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   <SuperMemoElement>
     <ElementID>60987</ElementID>
     <Content>
       <Question>hist: There was an assassination attempt in [...](year) of Pope John Paul II in the Vatican by a member of the Turkish nationalist Grey Wolves</Question>
       <Answer><![CDATA[<A class=internal title=1981 href="http://www.wikipedia.org/wiki/1981">1981</A>]]></Answer>
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         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>40609</ElementID>
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       <Question>hist: When did Confucius live?</Question>
       <Answer>5th century BC</Answer>
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     <LearningData>
         <Interval>1026</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>40420</ElementID>
     <Content>
       <Question>hist: Who invented the phonograph?</Question>
       <Answer>Thomas Edison</Answer>
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     <LearningData>
         <Interval>1765</Interval>
         <Repetitions>11</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>73077</ElementID>
     <Content>
       <Question>hist: In 1994 ...(auto navigation systems) become available in the US</Question>
       <Answer>GPS</Answer>
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     <LearningData>
         <Interval>1054</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>199304</ElementID>
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       <Question>hist: [...](who) was elected chair of the German Nazi party in 1921</Question>
       <Answer>(Adolf) Hitler</Answer>
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     <LearningData>
         <Interval>223</Interval>
         <Repetitions>2</Repetitions>
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   <SuperMemoElement>
     <ElementID>40597</ElementID>
     <Content>
       <Question>hist: Who subsidized Karl Marx'es poor family?</Question>
       <Answer>Engels</Answer>
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     <LearningData>
         <Interval>1706</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>115210</ElementID>
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       <Question>hist: In 1938, Britain, France, Germany, and Italy signed the Munich Pact, which ceded to Germany the [...]</Question>
       <Answer>(Czechoslovakian) Sudetenland</Answer>
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     <LearningData>
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         <Lapses>0</Lapses>
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       <Question>hist: [...](63BC-14AD) was the first Roman emperor</Question>
       <Answer>Augustus (Gaius Julius Caesar Octavianus)</Answer>
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   <SuperMemoElement>
     <ElementID>57218</ElementID>
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       <Question>hist: What philosophical trend did Seneca represent (1st century)?</Question>
       <Answer>stoicism</Answer>
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     <LearningData>
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         <Repetitions>6</Repetitions>
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       <Question>hist: The great era of inventive activity started in [...](country) in the 1700s as the Industrial Revolution</Question>
       <Answer>England</Answer>
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     <ElementID>64480</ElementID>
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       <Question>hist: When was Rome converted from monarchy to republic?</Question>
       <Answer>around 500 BC (exactly: 509 BC)</Answer>
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         <Lapses>3</Lapses>
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   <SuperMemoElement>
     <ElementID>40499</ElementID>
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       <Question>hist: Did Galileo get his degree as a medical student?</Question>
       <Answer>no (he dropped out)</Answer>
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     <LearningData>
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         <Repetitions>6</Repetitions>
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   <SuperMemoElement>
     <ElementID>40655</ElementID>
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       <Question>hist:  When did Noah Webster compile "An American Dictionary of the English Language"?</Question>
       <Answer>early 19th century (1828)</Answer>
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     <LearningData>
         <Interval>1253</Interval>
         <Repetitions>6</Repetitions>
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   <SuperMemoElement>
     <ElementID>40478</ElementID>
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       <Question>hist: Who showed that rabies is caused by a transferable agent too small to be seen with a microscope (in 1882)?</Question>
       <Answer>Louis Pasteur (b. 1822)</Answer>
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     <LearningData>
         <Interval>990</Interval>
         <Repetitions>11</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>64671</ElementID>
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       <Question>hist: In the ...(war), the US and the Republic of Vietnam opposed the Viet Cong and the Communist Vietnam</Question>
       <Answer>Vietnam War</Answer>
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     <LearningData>
         <Interval>1328</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>97519</ElementID>
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       <Question>hist: In 1957, [...](country) launches Sputnik - the first artificial earth satellite</Question>
       <Answer>USSR</Answer>
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     <LearningData>
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   <SuperMemoElement>
     <ElementID>68339</ElementID>
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       <Question>hist: What was the name of Claudius'es wife who is said to have poisoned him?</Question>
       <Answer>Agrippina (sister of Caligula)</Answer>
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     <LearningData>
         <Interval>1090</Interval>
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         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>40617</ElementID>
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       <Question>hist: When were the first 10-storied buildings first built?</Question>
       <Answer>end of 19th century (in Chicago)</Answer>
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     <LearningData>
         <Interval>1027</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>76940</ElementID>
     <Content>
       <Question>hist: On Oct. 22, 1962, President [...] announced that photographs taken by reconnaissance planes showed that Soviet atomic-missile sites were being built in Cuba</Question>
       <Answer>Kennedy</Answer>
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     <LearningData>
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   <SuperMemoElement>
     <ElementID>85479</ElementID>
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       <Question>hist: How long did the Cuban missile crisis last?</Question>
       <Answer>one week (Oct. 22-28, 1962)</Answer>
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         <Interval>444</Interval>
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     <ElementID>90642</ElementID>
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       <Question>hist: [...] and Pakistan became separate states in 1947</Question>
       <Answer>India</Answer>
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     <LearningData>
         <Interval>888</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>90646</ElementID>
     <Content>
       <Question>hist: India and Pakistan became separate states when the British granted India its independence in [...]</Question>
       <Answer>1947</Answer>
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     <LearningData>
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     <ElementID>40430</ElementID>
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       <Question>hist: What famous mathematician was admitted to university at the age of 11?</Question>
       <Answer>Norbert Wiener</Answer>
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   <SuperMemoElement>
     <ElementID>38418</ElementID>
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       <Question>hist: When were submarines first used?</Question>
       <Answer>WW1</Answer>
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     <ElementID>132043</ElementID>
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       <Question>hist: Late in the 2nd millennium BC, the Israelites settled in Palestine. Israelite religion was shaped under Hebrew prophet and lawgiver [...] about 1300 BC</Question>
       <Answer>Moses</Answer>
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     <LearningData>
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     <ElementID>40599</ElementID>
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       <Question>hist: What was the equivalent of German nazism in Italy before World War 2?</Question>
       <Answer>fascism</Answer>
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       <Question>hist: Where was Confucius born (5th century BC)?</Question>
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     <ElementID>40534</ElementID>
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       <Question>hist: Who is considered the first western philosopher?</Question>
       <Answer>Thales of Miletus (6th century BC)</Answer>
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       <Question>hist: Who discovered penicillin?</Question>
       <Answer>Alexander Fleming (1929)</Answer>
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     <ElementID>40627</ElementID>
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       <Question>hist: When was antipolio vaccine developed?</Question>
       <Answer>in the 1950s (Jonas Salk, United States, 1954)</Answer>
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         <AFactor>3.516</AFactor>
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   <SuperMemoElement>
     <ElementID>73758</ElementID>
     <Content>
       <Question>hist: Which year did Intel develop the first memory chip (1024 bits of data)?</Question>
       <Answer>1970</Answer>
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     <LearningData>
         <Interval>1081</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>39379</ElementID>
     <Content>
       <Question>hist: What did John Bardeen share Nobel Prize twice for?</Question>
       <Answer><![CDATA[transistor (1956 with W. Shockley)<br>theory of superconductivity (1972)]]></Answer>
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     <LearningData>
         <Interval>550</Interval>
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   <SuperMemoElement>
     <ElementID>83038</ElementID>
     <Content>
       <Question>hist: Hiroshima was bombed on Aug 6, 1945 and [...] 3 days later</Question>
       <Answer>Nagasaki</Answer>
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     <LearningData>
         <Interval>887</Interval>
         <Repetitions>3</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>40589</ElementID>
     <Content>
       <Question>hist: Why did Marx criticize private property?</Question>
       <Answer>because it makes people work for themselves rather than for the species</Answer>
     </Content>
     <LearningData>
         <Interval>1151</Interval>
         <Repetitions>6</Repetitions>
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   <SuperMemoElement>
     <ElementID>73079</ElementID>
     <Content>
       <Question>hist: What company did Marc Andreessen help found in 1994?</Question>
       <Answer>Netscape</Answer>
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     <LearningData>
         <Interval>1069</Interval>
         <Repetitions>5</Repetitions>
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   <SuperMemoElement>
     <ElementID>64512</ElementID>
     <Content>
       <Question>hist: Who ruled Spain in the years 1936-1975?</Question>
       <Answer>Generalissimo Francisco Franco (nearly 40 years!)</Answer>
     </Content>
     <LearningData>
         <Interval>1366</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>68285</ElementID>
     <Content>
       <Question>hist: In 1922, Doctors Banting and Best discovered ...</Question>
       <Answer>insulin (since then diabetes is no longer considered a terminal illness)</Answer>
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     <LearningData>
         <Interval>938</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>64630</ElementID>
     <Content>
       <Question>hist: In 1939, the League of Nations condemned the USSR for its invasion of Finland and ...</Question>
       <Answer>expelled it</Answer>
     </Content>
     <LearningData>
         <Interval>985</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>29.05.2001</LastRepetition>
         <AFactor>4.744</AFactor>
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   <SuperMemoElement>
     <ElementID>76568</ElementID>
     <Content>
       <Question>hist: The battle of France in WW2 began June 5, [...]</Question>
       <Answer>1940</Answer>
     </Content>
     <LearningData>
         <Interval>947</Interval>
         <Repetitions>4</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>18.07.2001</LastRepetition>
         <AFactor>5.381</AFactor>
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   <SuperMemoElement>
     <ElementID>40515</ElementID>
     <Content>
       <Question>hist: When were special and general theories of relativity announced (by Einstein)?</Question>
       <Answer>1905 and 1915</Answer>
     </Content>
     <LearningData>
         <Interval>1121</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>18.02.2001</LastRepetition>
         <AFactor>4.379</AFactor>
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   <SuperMemoElement>
     <ElementID>57206</ElementID>
     <Content>
       <Question>hist: Was Nero a good ruler of Rome (1st century)?</Question>
       <Answer>only at the beginning of his reign (good advice from Seneca)</Answer>
     </Content>
     <LearningData>
         <Interval>1385</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>23.05.2000</LastRepetition>
         <AFactor>6.403</AFactor>
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   <SuperMemoElement>
     <ElementID>108730</ElementID>
     <Content>
       <Question>hist: On Oct. 12, [...](year), Columbus stepped ashore on an island in what has since become known as the Americas</Question>
       <Answer>1492 (aged 41)</Answer>
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     <LearningData>
         <Interval>210</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>1</Lapses>
         <LastRepetition>12.10.2003</LastRepetition>
         <AFactor>1.802</AFactor>
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   <SuperMemoElement>
     <ElementID>74752</ElementID>
     <Content>
       <Question>hist: In 1215, Magna Carta, established the rights of subjects to ..., protecting them from the threat of arbitrary confiscation by the crown</Question>
       <Answer>(their own) property</Answer>
     </Content>
     <LearningData>
         <Interval>1136</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
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         <AFactor>5.443</AFactor>
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   <SuperMemoElement>
     <ElementID>40484</ElementID>
     <Content>
       <Question>hist: Who was the most famous student of Socrates?</Question>
       <Answer>Plato</Answer>
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     <LearningData>
         <Interval>1233</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>7</Lapses>
         <LastRepetition>12.08.2003</LastRepetition>
         <AFactor>4.304</AFactor>
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   <SuperMemoElement>
     <ElementID>64649</ElementID>
     <Content>
       <Question>hist: Mussolini and Clara Petacci were were ... on April 28, 1945</Question>
       <Answer>shot/killed (their bodies were hung in a square in Milan)</Answer>
     </Content>
     <LearningData>
         <Interval>1367</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>04.10.2003</LastRepetition>
         <AFactor>4.492</AFactor>
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   <SuperMemoElement>
     <ElementID>38452</ElementID>
     <Content>
       <Question>hist: When did Socrates live?</Question>
       <Answer>5th century BC (469-399 BC)</Answer>
     </Content>
     <LearningData>
         <Interval>759</Interval>
         <Repetitions>3</Repetitions>
         <Lapses>1</Lapses>
         <LastRepetition>22.04.2002</LastRepetition>
         <AFactor>3.856</AFactor>
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   <SuperMemoElement>
     <ElementID>66799</ElementID>
     <Content>
       <Question>hist: In which year did Ray Tomlinson write the first e-mail program for the Internet?</Question>
       <Answer>1971</Answer>
     </Content>
     <LearningData>
         <Interval>1077</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>31.03.2001</LastRepetition>
         <AFactor>2.987</AFactor>
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   <SuperMemoElement>
     <ElementID>66247</ElementID>
     <Content>
       <Question>hist: In 1812, a factory worker Ned Ludd inspires other workers to destroy "labor-saving" machines. ... later comes to refer to anyone who opposes technology</Question>
       <Answer>Luddite</Answer>
     </Content>
     <LearningData>
         <Interval>1286</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>18.08.2000</LastRepetition>
         <AFactor>6.739</AFactor>
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   <SuperMemoElement>
     <ElementID>64615</ElementID>
     <Content>
       <Question>hist: In 1933, Hitler took Germany out of the ...(organization) and started open rearmament in defiance of the Versailles Treaty</Question>
       <Answer><![CDATA[<FONT size=2><br><P>League of Nations</P></FONT>]]></Answer>
     </Content>
     <LearningData>
         <Interval>1319</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>22.07.2000</LastRepetition>
         <AFactor>6.795</AFactor>
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   <SuperMemoElement>
     <ElementID>110292</ElementID>
     <Content>
       <Question>hist: In [...] the United Nations voted to divide Palestine into Arab and Jewish states</Question>
       <Answer>1947</Answer>
     </Content>
     <LearningData>
         <Interval>951</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>27.06.2001</LastRepetition>
         <AFactor>6.235</AFactor>
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   <SuperMemoElement>
     <ElementID>56928</ElementID>
     <Content>
       <Question>hist: What was the speed of 4004 as compared with Eniac (1971)?</Question>
       <Answer>comparable</Answer>
     </Content>
     <LearningData>
         <Interval>1103</Interval>
         <Repetitions>9</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>19.02.2001</LastRepetition>
         <AFactor>4.080</AFactor>
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   <SuperMemoElement>
     <ElementID>41954</ElementID>
     <Content>
       <Question>hist: How long did it take to develop all the major applications of the steam engine?</Question>
       <Answer>over a century</Answer>
     </Content>
     <LearningData>
         <Interval>1179</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>26.11.2000</LastRepetition>
         <AFactor>3.875</AFactor>
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   <SuperMemoElement>
     <ElementID>41753</ElementID>
     <Content>
       <Question>hist: When were armed forces disbanded in Cost Rica?</Question>
       <Answer>1948</Answer>
     </Content>
     <LearningData>
         <Interval>1400</Interval>
         <Repetitions>4</Repetitions>
         <Lapses>1</Lapses>
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         <AFactor>4.433</AFactor>
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   <SuperMemoElement>
     <ElementID>73823</ElementID>
     <Content>
       <Question>hist: What was the public reaction to Blaise Pascal's mechanical calculator (1642)?</Question>
       <Answer>cold/sceptical</Answer>
     </Content>
     <LearningData>
         <Interval>961</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>08.07.2001</LastRepetition>
         <AFactor>4.064</AFactor>
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   <SuperMemoElement>
     <ElementID>64769</ElementID>
     <Content>
       <Question>hist: In which country was the Kurdish separatist movement most active?</Question>
       <Answer>Iraq (uprisings: 1922, 1974, 1988 and 1991)</Answer>
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     <LearningData>
         <Interval>1158</Interval>
         <Repetitions>4</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>20.12.2000</LastRepetition>
         <AFactor>6.653</AFactor>
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   <SuperMemoElement>
     <ElementID>64613</ElementID>
     <Content>
       <Question>hist: In 1933, ...(leader) took Germany out of the League of Nations and started open rearmament in defiance of the Versailles Treaty</Question>
       <Answer>Hitler</Answer>
     </Content>
     <LearningData>
         <Interval>1055</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>17.03.2001</LastRepetition>
         <AFactor>6.795</AFactor>
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   <SuperMemoElement>
     <ElementID>124568</ElementID>
     <Content>
       <Question>hist: On June 17, 1972, five men were arrested for breaking into Democratic National Committee headquarters in the [...] office-apartment-hotel complex in Washington, D.C.</Question>
       <Answer>Watergate</Answer>
     </Content>
     <LearningData>
         <Interval>554</Interval>
         <Repetitions>4</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>17.08.2002</LastRepetition>
         <AFactor>5.515</AFactor>
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   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>127189</ElementID>
     <Content>
       <Question>hist: Epicureanism was the philosophy taught by [...](341-270 BC)</Question>
       <Answer>Epicurus</Answer>
     </Content>
     <LearningData>
         <Interval>708</Interval>
         <Repetitions>1</Repetitions>
         <Lapses>2</Lapses>
         <LastRepetition>19.03.2002</LastRepetition>
         <AFactor>2.371</AFactor>
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   <SuperMemoElement>
     <ElementID>125290</ElementID>
     <Content>
       <Question>hist: On Feb. 1, 1979, [...](leader) flew back to a tumultuous welcome in Tehran after 15 years in exile</Question>
       <Answer>Khomeini</Answer>
     </Content>
     <LearningData>
         <Interval>562</Interval>
         <Repetitions>3</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>05.10.2002</LastRepetition>
         <AFactor>6.521</AFactor>
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   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>40417</ElementID>
     <Content>
       <Question>hist: When was the difference machine II by Charles Babbage designed?</Question>
       <Answer>mid 19-th century (exactly: 1847)</Answer>
     </Content>
     <LearningData>
         <Interval>1287</Interval>
         <Repetitions>11</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>17.08.2000</LastRepetition>
         <AFactor>1.521</AFactor>
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   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>41992</ElementID>
     <Content>
       <Question>hist: When was the first integrated circuit developed?</Question>
       <Answer>1959</Answer>
     </Content>
     <LearningData>
         <Interval>906</Interval>
         <Repetitions>10</Repetitions>
         <Lapses>4</Lapses>
         <LastRepetition>01.09.2001</LastRepetition>
         <AFactor>1.482</AFactor>
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   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>104129</ElementID>
     <Content>
       <Question>hist: When Genghis Khan died, [...] armies were poised to conquer Hungary, which they would have accomplished had not their leader died</Question>
       <Answer>Mongol</Answer>
     </Content>
     <LearningData>
         <Interval>669</Interval>
         <Repetitions>3</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>09.05.2002</LastRepetition>
         <AFactor>6.517</AFactor>
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   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>67281</ElementID>
     <Content>
       <Question>hist: In 476 [...](name) was deposed by the barbarian leader Odoacer. The Roman Empire was at an end</Question>
       <Answer>Romulus Augustulus</Answer>
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     <LearningData>
         <Interval>897</Interval>
         <Repetitions>3</Repetitions>
         <Lapses>1</Lapses>
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         <AFactor>3.345</AFactor>
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   <SuperMemoElement>
     <ElementID>86911</ElementID>
     <Content>
       <Question>hist: In 476 the Roman Empire was at an end, but the [...] Empire lasted another 1,000 years</Question>
       <Answer>Eastern/Byzantine</Answer>
     </Content>
     <LearningData>
         <Interval>990</Interval>
         <Repetitions>3</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>10.06.2001</LastRepetition>
         <AFactor>6.475</AFactor>
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   <SuperMemoElement>
     <ElementID>31190</ElementID>
     <Content>
       <Question>hist: Which year was Hilter born?</Question>
       <Answer>1889</Answer>
     </Content>
     <LearningData>
         <Interval>1318</Interval>
         <Repetitions>4</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>27.07.2000</LastRepetition>
         <AFactor>4.658</AFactor>
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   </SuperMemoElement>

   <SuperMemoElement>
     <ElementID>204423</ElementID>
     <Content>
       <Question>hist: The Soviets attacked Berlin on [...] 21, 1945</Question>
       <Answer>April</Answer>
     </Content>
     <LearningData>
         <Interval>198</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>05.08.2003</LastRepetition>
         <AFactor>6.315</AFactor>
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   <SuperMemoElement>
     <ElementID>40413</ElementID>
     <Content>
       <Question>hist: When did the great epidemic of influenza take place (20 m deaths)?</Question>
       <Answer>1918</Answer>
     </Content>
     <LearningData>
         <Interval>1030</Interval>
         <Repetitions>4</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>19.05.2001</LastRepetition>
         <AFactor>4.658</AFactor>
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   <SuperMemoElement>
     <ElementID>147187</ElementID>
     <Content>
       <Question>hist: In 1948, the European Recovery Program (ERP) went into effect (popularly known as the [...])</Question>
       <Answer>Marshall Plan (after George Marshall; 1880-1959)</Answer>
     </Content>
     <LearningData>
         <Interval>563</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>05.08.2002</LastRepetition>
         <AFactor>6.315</AFactor>
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   <SuperMemoElement>
     <ElementID>40505</ElementID>
     <Content>
       <Question>hist: How many years had passed between his voyage aboard Beagle and the publication of "On the Origin of Species" by Darwin?</Question>
       <Answer>20 (On the Origin of Species was published in 1859)</Answer>
     </Content>
     <LearningData>
         <Interval>1333</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>9</Lapses>
         <LastRepetition>13.06.2000</LastRepetition>
         <AFactor>4.795</AFactor>
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   <SuperMemoElement>
     <ElementID>45801</ElementID>
     <Content>
       <Question>hist: Two countries in Africa never were colonies. The first is ..., a monarchy until 1974. The other is Liberia</Question>
       <Answer>Ethiopia</Answer>
     </Content>
     <LearningData>
         <Interval>1046</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>27.10.2003</LastRepetition>
         <AFactor>5.375</AFactor>
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   <SuperMemoElement>
     <ElementID>64652</ElementID>
     <Content>
       <Question>hist: Mussolini and Clara Petacci were captured by Italian partisans and shot on April 28, 1945 and their bodies were ... in a public square in Milan</Question>
       <Answer>hung</Answer>
     </Content>
     <LearningData>
         <Interval>1078</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>04.03.2001</LastRepetition>
         <AFactor>5.635</AFactor>
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   <SuperMemoElement>
     <ElementID>64687</ElementID>
     <Content>
       <Question>hist: Communist leader Ho Chi Minh organized resistance against the ... and in 1945 declared Vietnam an independent republic</Question>
       <Answer>Japanese</Answer>
     </Content>
     <LearningData>
         <Interval>1221</Interval>
         <Repetitions>1</Repetitions>
         <Lapses>4</Lapses>
         <LastRepetition>12.10.2000</LastRepetition>
         <AFactor>4.360</AFactor>
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   <SuperMemoElement>
     <ElementID>64841</ElementID>
     <Content>
       <Question>polit: Does Turkey belong to the EU (2001)?</Question>
       <Answer>no (its application was rejected in 1989 due to human rights violations)</Answer>
     </Content>
     <LearningData>
         <Interval>1114</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>01.02.2001</LastRepetition>
         <AFactor>5.499</AFactor>
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   <SuperMemoElement>
     <ElementID>143516</ElementID>
     <Content>
       <Question>hist: In 387 BC Plato established a school in Athens called [...]</Question>
       <Answer>the Academy</Answer>
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     <LearningData>
         <Interval>634</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>27.05.2002</LastRepetition>
         <AFactor>6.315</AFactor>
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   <SuperMemoElement>
     <ElementID>41745</ElementID>
     <Content>
       <Question>hist: How many people were killed in the war in Bosnia 1991-1993?</Question>
       <Answer>250,000</Answer>
     </Content>
     <LearningData>
         <Interval>1021</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>8</Lapses>
         <LastRepetition>16.05.2001</LastRepetition>
         <AFactor>3.470</AFactor>
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   <SuperMemoElement>
     <ElementID>63715</ElementID>
     <Content>
       <Question>hist: Which French president helped the formation of independent Algeria in 1962?</Question>
       <Answer>Charles de Gaulle</Answer>
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     <LearningData>
         <Interval>1293</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>23.07.2000</LastRepetition>
         <AFactor>5.021</AFactor>
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   <SuperMemoElement>
     <ElementID>99070</ElementID>
     <Content>
       <Question>hist: Lenin's death in January 1924 set off a succession struggle. Stalin eventually outwitted [...](Lenin's natural successor)</Question>
       <Answer>Trotsky</Answer>
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     <LearningData>
         <Interval>1061</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>26.03.2001</LastRepetition>
         <AFactor>6.251</AFactor>
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   <SuperMemoElement>
     <ElementID>63284</ElementID>
     <Content>
       <Question>hist: How many wars were there between India and Pakistan (2000)?</Question>
       <Answer>three</Answer>
     </Content>
     <LearningData>
         <Interval>1121</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>2</Lapses>
         <LastRepetition>23.01.2001</LastRepetition>
         <AFactor>2.256</AFactor>
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   <SuperMemoElement>
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       <Question>hist: Queen [...] (1819-1901) became queen upon the death of her uncle William IV in 1837</Question>
       <Answer><![CDATA[<I>Victoria</I>]]></Answer>
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     <ElementID>108828</ElementID>
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       <Question>hist: The U.S.S.R. legally [...] on Dec. 31, 1991</Question>
       <Answer>ceased to exist</Answer>
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         <Interval>958</Interval>
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   <SuperMemoElement>
     <ElementID>63714</ElementID>
     <Content>
       <Question>hist: Who was elected the first president of French Fifth Republic in 1958?</Question>
       <Answer>Charles de Gaulle</Answer>
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         <Interval>847</Interval>
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   <SuperMemoElement>
     <ElementID>67263</ElementID>
     <Content>
       <Question>hist: The Crusades were Christian military expeditions undertaken in the 11th-13th century to recapture the ... from the Muslims</Question>
       <Answer>Holy Land</Answer>
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         <Interval>943</Interval>
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   <SuperMemoElement>
     <ElementID>125262</ElementID>
     <Content>
       <Question>hist: On December 12, [...](year), Marconi transmitted and received radio signals across the Atlantic Ocean</Question>
       <Answer>1901</Answer>
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         <Interval>586</Interval>
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   <SuperMemoElement>
     <ElementID>105589</ElementID>
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       <Question>hist: Battle of [...] (31 BC): naval battle on the coast of Greece, where Octavian, by his victory over Mark Antony, became the master of the Roman world</Question>
       <Answer>Actium</Answer>
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     <LearningData>
         <Interval>713</Interval>
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   <SuperMemoElement>
     <ElementID>105591</ElementID>
     <Content>
       <Question>hist: Battle of Actium (31 BC) was the naval battle where Octavian, by his decisive victory over [...], became the undisputed master of the Roman world</Question>
       <Answer><![CDATA[<A class=internal title="Mark Antony" href="http://www.wikipedia.org/wiki/Mark_Antony">Mark Antony</A>]]></Answer>
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     <LearningData>
         <Interval>973</Interval>
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         <Lapses>0</Lapses>
         <LastRepetition>11.06.2001</LastRepetition>
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   <SuperMemoElement>
     <ElementID>64642</ElementID>
     <Content>
       <Question>hist: Where is Pearl Harbor located (US Pacific fleet lost 18 ships on Dec 7, 1941)?</Question>
       <Answer>Hawaii</Answer>
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     <LearningData>
         <Interval>1098</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>134342</ElementID>
     <Content>
       <Question>hist: Crusade: any of a series of military expeditions to take possession of the Holy City of [...]</Question>
       <Answer>Jerusalem</Answer>
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     <LearningData>
         <Interval>713</Interval>
         <Repetitions>3</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>76203</ElementID>
     <Content>
       <Question>hist: A great era of inventive activity started in England in the 1700s. This was the period called the ...</Question>
       <Answer>Industrial Revolution (leading to the modern factory system)</Answer>
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     <LearningData>
         <Interval>1608</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>30.07.2003</LastRepetition>
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   <SuperMemoElement>
     <ElementID>72505</ElementID>
     <Content>
       <Question>hist: In 1980, the voters gave Mugabe's Zimbabwe African National Union (ZANU) a strong victory, and Rhodesia became ...(state)</Question>
       <Answer>Zimbabwe</Answer>
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     <LearningData>
         <Interval>1233</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>64513</ElementID>
     <Content>
       <Question>hist: Which countries backed Franco in the Spanish Civil War (1936-39)?</Question>
       <Answer>Germany and Italy</Answer>
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     <LearningData>
         <Interval>1059</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>100904</ElementID>
     <Content>
       <Question>hist: When Brezhnev died in [...](year) the plight of the U.S.S.R. had reached crisis proportions</Question>
       <Answer>1982</Answer>
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     <LearningData>
         <Interval>826</Interval>
         <Repetitions>3</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>8698</ElementID>
     <Content>
       <Question>hist: In 1979 Dan Bricklin and Bob Frankston introduced ...(the first killer app)</Question>
       <Answer>VisiCalc ("visible calculator")</Answer>
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     <LearningData>
         <Interval>962</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>27.06.2001</LastRepetition>
         <AFactor>2.985</AFactor>
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   <SuperMemoElement>
     <ElementID>40439</ElementID>
     <Content>
       <Question>hist: What was the cumulative growth of global economy in the industrial era of 1870-1910?</Question>
       <Answer>400% (i.e. 3.5% per annum)</Answer>
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     <LearningData>
         <Interval>1494</Interval>
         <Repetitions>12</Repetitions>
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   <SuperMemoElement>
     <ElementID>63718</ElementID>
     <Content>
       <Question>hist: Who edited the first Russian newspaper (early 18-th century)?</Question>
       <Answer>Peter the Great</Answer>
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     <LearningData>
         <Interval>1161</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>10.12.2000</LastRepetition>
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   <SuperMemoElement>
     <ElementID>41465</ElementID>
     <Content>
       <Question>hist: In 1980, the voters gave ZANU a strong victory over ZAPU, and Rhodesia became Zimbabwe with ...(leader) as prime minister</Question>
       <Answer>(Robert) Mugabe</Answer>
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     <LearningData>
         <Interval>1236</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>158511</ElementID>
     <Content>
       <Question>hist: [...] is an ancient region between the Tigris and Euphrates rivers in modern-day Iraq settled before 5000 B.C.</Question>
       <Answer><![CDATA[<A class=internal title=Mesopotamia href="http://www.wikipedia.org/wiki/Mesopotamia">Mesopotamia</A>]]></Answer>
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     <LearningData>
         <Interval>580</Interval>
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   <SuperMemoElement>
     <ElementID>73175</ElementID>
     <Content>
       <Question>hist: Between 1500 and ...(end of the slavery era), an estimated 10 million slaves left Africa</Question>
       <Answer>1870</Answer>
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     <LearningData>
         <Interval>816</Interval>
         <Repetitions>1</Repetitions>
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   <SuperMemoElement>
     <ElementID>40562</ElementID>
     <Content>
       <Question>hist: What did Marie Curie die of?</Question>
       <Answer>leukemia</Answer>
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     <LearningData>
         <Interval>2222</Interval>
         <Repetitions>10</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>23.08.2003</LastRepetition>
         <AFactor>4.951</AFactor>
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   <SuperMemoElement>
     <ElementID>40513</ElementID>
     <Content>
       <Question>hist: For how many years did Avogadro's theory on forming molecules from atoms remain unrecognized?</Question>
       <Answer>almost sixty (until 1860)</Answer>
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     <LearningData>
         <Interval>1365</Interval>
         <Repetitions>11</Repetitions>
         <Lapses>0</Lapses>
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         <AFactor>3.690</AFactor>
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   <SuperMemoElement>
     <ElementID>60764</ElementID>
     <Content>
       <Question>hist: In the summer of ..., the rulers of Europe, after decade of rising tensions, marched their peoples to WW1</Question>
       <Answer>1914</Answer>
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     <LearningData>
         <Interval>1064</Interval>
         <Repetitions>3</Repetitions>
         <Lapses>1</Lapses>
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   <SuperMemoElement>
     <ElementID>208639</ElementID>
     <Content>
       <Question>hist: The Eastern Roman Empire (Byzantine Empire) continued until [...](year)</Question>
       <Answer>1453</Answer>
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     <LearningData>
         <Interval>179</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>14.08.2003</LastRepetition>
         <AFactor>6.315</AFactor>
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   <SuperMemoElement>
     <ElementID>191867</ElementID>
     <Content>
       <Question>hist: On [...], 1945 Truman, Churchill, and Stalin announced that General Keitel had surrendered unconditionally the day before</Question>
       <Answer>May 8</Answer>
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     <LearningData>
         <Interval>182</Interval>
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         <Lapses>2</Lapses>
         <LastRepetition>08.08.2003</LastRepetition>
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   <SuperMemoElement>
     <ElementID>40563</ElementID>
     <Content>
       <Question>hist: What were Irene and Frederic Joliot-Curie awarded the 1935 Nobel Prize for?</Question>
       <Answer>work on artificial radioactivity (irradiation of aluminum by alpha particles)</Answer>
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     <LearningData>
         <Interval>1022</Interval>
         <Repetitions>11</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>63716</ElementID>
     <Content>
       <Question>hist: Which French president vetoed British entry to the Common European Market in 1967?</Question>
       <Answer>Charles de Gaulle</Answer>
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     <LearningData>
         <Interval>952</Interval>
         <Repetitions>10</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>63720</ElementID>
     <Content>
       <Question>hist: Which tsar promoted secular education and banned men under 30 from becoming monks?</Question>
       <Answer>Peter the Great</Answer>
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     <LearningData>
         <Interval>831</Interval>
         <Repetitions>9</Repetitions>
         <Lapses>0</Lapses>
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         <AFactor>3.590</AFactor>
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   <SuperMemoElement>
     <ElementID>73929</ElementID>
     <Content>
       <Question>hist: Chile enjoyed one of the longest-lasting democracies in Latin America until ...(year), when a bloody military coup toppled President Salvador Allende</Question>
       <Answer>1973</Answer>
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     <LearningData>
         <Interval>1202</Interval>
         <Repetitions>1</Repetitions>
         <Lapses>3</Lapses>
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   <SuperMemoElement>
     <ElementID>73440</ElementID>
     <Content>
       <Question>hist: The success of the ECSC prompted the 6 nations to sign the Treaty of Rome on March 25, 1957. The ..., was formed on Jan. 1, 1958</Question>
       <Answer>EEC (or Common Market)</Answer>
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     <LearningData>
         <Interval>915</Interval>
         <Repetitions>9</Repetitions>
         <Lapses>1</Lapses>
         <LastRepetition>01.09.2001</LastRepetition>
         <AFactor>3.780</AFactor>
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   <SuperMemoElement>
     <ElementID>40576</ElementID>
     <Content>
       <Question>hist: Why did Max Born lose his professorship when Hitler came to power?</Question>
       <Answer>because of his Jewish origin</Answer>
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     <LearningData>
         <Interval>968</Interval>
         <Repetitions>8</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>143517</ElementID>
     <Content>
       <Question>hist: In 387 BC Plato, who had studied under Socrates, established a school in [...](city) called the Academy</Question>
       <Answer>Athens</Answer>
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     <LearningData>
         <Interval>591</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>125833</ElementID>
     <Content>
       <Question>hist: Eisenhower had to form the largest invasion fleet in history for an amphibious landing on the coast of [...](country)(June 6, 1944)</Question>
       <Answer>France</Answer>
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     <LearningData>
         <Interval>811</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>02.12.2001</LastRepetition>
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   <SuperMemoElement>
     <ElementID>39737</ElementID>
     <Content>
       <Question>hist: What was the annual growth in armament costs in the years 1980-86 (Reagan's era)?</Question>
       <Answer>6%</Answer>
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     <LearningData>
         <Interval>1143</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>40504</ElementID>
     <Content>
       <Question>hist: When did people realize that the universe had to be far older than the 6,000 years computed by chronologers from the Book of Genesis?</Question>
       <Answer>18th century (owing to cosmological theories of Immanuel Kant and Laplace)</Answer>
     </Content>
     <LearningData>
         <Interval>1126</Interval>
         <Repetitions>1</Repetitions>
         <Lapses>4</Lapses>
         <LastRepetition>23.01.2001</LastRepetition>
         <AFactor>1.570</AFactor>
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   <SuperMemoElement>
     <ElementID>74265</ElementID>
     <Content>
       <Question>hist: The spark for WW1 was the murder, in June ...(year), in Sarajevo, part of the Austro-Hungarian empire, of the heir to the throne</Question>
       <Answer>1914</Answer>
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     <LearningData>
         <Interval>982</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>16.06.2001</LastRepetition>
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   <SuperMemoElement>
     <ElementID>125263</ElementID>
     <Content>
       <Question>hist: On December 12, 1901, [...](person) transmitted and received signals across the Atlantic Ocean</Question>
       <Answer>Marconi</Answer>
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     <LearningData>
         <Interval>806</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>01.12.2001</LastRepetition>
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   <SuperMemoElement>
     <ElementID>40637</ElementID>
     <Content>
       <Question>hist: What script was used in Babylon?</Question>
       <Answer><![CDATA[<FONT color=#0000ff size=2>cuneiform</FONT>]]></Answer>
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     <LearningData>
         <Interval>714</Interval>
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     <ElementID>86034</ElementID>
     <Content>
       <Question>hist: Japan's surrender in WW2 came onboard the battleship Missouri on [...](month) 2, 1945</Question>
       <Answer>Sep</Answer>
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     <LearningData>
         <Interval>1205</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>16.11.2000</LastRepetition>
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   <SuperMemoElement>
     <ElementID>60979</ElementID>
     <Content>
       <Question>hist: Freetown was settled in the 1780s by freed slaves who mingled with the indigenous population to produce a new society known as Sierra Leone ...</Question>
       <Answer>Creole</Answer>
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     <LearningData>
         <Interval>1253</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>22.09.2000</LastRepetition>
         <AFactor>4.799</AFactor>
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   <SuperMemoElement>
     <ElementID>75913</ElementID>
     <Content>
       <Question>hist: Venezuela, Colombia, Panama, Ecuador, Peru, and Bolivia--venerate ... (1783-1830) as their liberator from the rule of Spain</Question>
       <Answer>Simon Bolivar</Answer>
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     <LearningData>
         <Interval>1161</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>18.12.2000</LastRepetition>
         <AFactor>5.191</AFactor>
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   <SuperMemoElement>
     <ElementID>41828</ElementID>
     <Content>
       <Question>hist: What is Bhuddism based on?</Question>
       <Answer>teachings of Bhudda (VI century AD)</Answer>
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     <LearningData>
         <Interval>1468</Interval>
         <Repetitions>5</Repetitions>
         <Lapses>1</Lapses>
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         <AFactor>1.961</AFactor>
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   <SuperMemoElement>
     <ElementID>83090</ElementID>
     <Content>
       <Question>hist: X rays were discovered by [...] of Germany in 1895</Question>
       <Answer>Wilhelm Conrad Roentgen</Answer>
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     <LearningData>
         <Interval>943</Interval>
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         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>40463</ElementID>
     <Content>
       <Question>hist: Whose positive religion strived for progress of humanity?</Question>
       <Answer>Auguste Comte</Answer>
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     <LearningData>
         <Interval>1462</Interval>
         <Repetitions>9</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>64650</ElementID>
     <Content>
       <Question>hist: Mussolini and his mistress, Clara Petacci, were captured by Italian partisans at Lake Como, they were shot on April 28, ...</Question>
       <Answer><![CDATA[<FONT style="BACKGROUND-COLOR: #dfbdbd">1945</FONT>]]></Answer>
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   <SuperMemoElement>
     <ElementID>63362</ElementID>
     <Content>
       <Question>hist: When did Franklin Delano Roosevelet die?</Question>
       <Answer>1945 (three weeks before Germany's surrender)</Answer>
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         <Interval>1151</Interval>
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         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>40649</ElementID>
     <Content>
       <Question>hist: Why did homeopathy result in little harm to patients (18th and 19th century)?</Question>
       <Answer>because of the rule that the prescribed drug should be given in small amounts</Answer>
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     <LearningData>
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     <ElementID>74295</ElementID>
     <Content>
       <Question>hist: The construction of a sea-level Panama canal was begun in 1882. Mismanagement, dishonesty, and terrible epidemics of disease in Panama forced the French company into ... in 1889</Question>
       <Answer>bankruptcy</Answer>
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     <LearningData>
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         <Lapses>0</Lapses>
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       <Question>hist: The Great Depression was dramatically announced by the collapse of the [...], on Friday, Oct. 24, 1929</Question>
       <Answer><![CDATA[<FONT size=2><br><P>American stock market</P></FONT>]]></Answer>
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       <Question>hist: How did Antoine Laurent Lavoisier die on May 8, 1794?</Question>
       <Answer>execution by guillotine (during the Reign of Terror in France)</Answer>
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     <ElementID>40472</ElementID>
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       <Question>hist: How long did The Course of Positive Philosophy by Auguste Comte wait for translation to English?</Question>
       <Answer>60 years!</Answer>
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         <Interval>1035</Interval>
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     <ElementID>38701</ElementID>
     <Content>
       <Question>hist: In October [...], in Reykjav&#237;k, Reagan came close to embracing Gorbachev's vision of eliminating nuclear weapons by 2000, but no agreement was reached because he refused to abandon SDI</Question>
       <Answer>1986</Answer>
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   <SuperMemoElement>
     <ElementID>107193</ElementID>
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       <Question>hist: Austria-Hungary declared war on [...] on July 28, 1914</Question>
       <Answer>Serbia</Answer>
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         <Interval>984</Interval>
         <Repetitions>2</Repetitions>
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     <ElementID>94918</ElementID>
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       <Question>hist: WW1 was precipitated by the assassination of Archduke Francis [...] of Austria-Hungary by in 1914</Question>
       <Answer>Ferdinand</Answer>
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     <ElementID>88719</ElementID>
     <Content>
       <Question>hist: By the Treaty of Versailles, Germany was forced to acknowledge guilt for [...]</Question>
       <Answer>WW1</Answer>
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         <Interval>1139</Interval>
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   <SuperMemoElement>
     <ElementID>70776</ElementID>
     <Content>
       <Question>hist: The first movie with sound, "Jazz Singer", premiered in ....</Question>
       <Answer>1926</Answer>
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     <LearningData>
         <Interval>1063</Interval>
         <Repetitions>6</Repetitions>
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   <SuperMemoElement>
     <ElementID>90722</ElementID>
     <Content>
       <Question>hist: In [...](year) Gorbachev received the Nobel Prize for Peace for his striking achievements in international relations</Question>
       <Answer>1990</Answer>
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     <LearningData>
         <Interval>811</Interval>
         <Repetitions>3</Repetitions>
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   <SuperMemoElement>
     <ElementID>67478</ElementID>
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       <Question>hist: Apollo 11 made the first manned lunar landing on July 20, ....</Question>
       <Answer>1969</Answer>
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     <LearningData>
         <Interval>979</Interval>
         <Repetitions>5</Repetitions>
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   <SuperMemoElement>
     <ElementID>74303</ElementID>
     <Content>
       <Question><![CDATA[hist: The best years for national independence were:<br>1960 - 18 nations in African gained independence <br>... - 16 nations in communist block]]></Question>
       <Answer>1991 (14 soviet republics as well as Croatia and Slovenia)</Answer>
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     <LearningData>
         <Interval>1066</Interval>
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   <SuperMemoElement>
     <ElementID>40476</ElementID>
     <Content>
       <Question>hist: How many inventions did Edison patent?</Question>
       <Answer>about 1000 (still a record in 2001)</Answer>
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     <LearningData>
         <Interval>1159</Interval>
         <Repetitions>9</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>74237</ElementID>
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       <Question>hist: For centuries, the annual rate of economic growth was zero. From about ..., this iron law of history was broken</Question>
       <Answer>1750</Answer>
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         <Interval>400</Interval>
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     <ElementID>212186</ElementID>
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       <Question>hist: On September 4, [...], Romulus Augustus (d. after 511) was compelled to abdicate by Odoacer</Question>
       <Answer>476</Answer>
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         <Interval>100</Interval>
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   <SuperMemoElement>
     <ElementID>110063</ElementID>
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       <Question>hist: The Battle of Britain (1940) was the first [...] defeat in WW2</Question>
       <Answer>German</Answer>
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   <SuperMemoElement>
     <ElementID>110065</ElementID>
     <Content>
       <Question>hist: The [...] was the first German defeat in WW2</Question>
       <Answer>Battle of Britain (1940)</Answer>
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     <LearningData>
         <Interval>838</Interval>
         <Repetitions>1</Repetitions>
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   <SuperMemoElement>
     <ElementID>57224</ElementID>
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       <Question>hist: What are the three epochs of the ancient Rome?</Question>
       <Answer><![CDATA[monarchy (753 BC - 509 BC)<br>republic (509 BC - 31 BC)<br>empire (31 BC - 476 AD)]]></Answer>
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     <LearningData>
         <Interval>100</Interval>
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   <SuperMemoElement>
     <ElementID>57203</ElementID>
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       <Question>hist: Who pushed Nero to power?</Question>
       <Answer>Agrippina (his mother)</Answer>
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     <LearningData>
         <Interval>1221</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>75492</ElementID>
     <Content>
       <Question>hist: On June 25, ..., the armed forces of Communist North Korea smashed across the 38th parallel in an invasion of the Republic of Korea (South Korea)</Question>
       <Answer>1950</Answer>
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     <LearningData>
         <Interval>1315</Interval>
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   <SuperMemoElement>
     <ElementID>87263</ElementID>
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       <Question>hist: [...](who) changed his party's name to National Socialist German Workers' party, abbreviated to Nazi (1920)</Question>
       <Answer>Adolf Hitler (1889-1945)</Answer>
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     <LearningData>
         <Interval>1014</Interval>
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   <SuperMemoElement>
     <ElementID>63092</ElementID>
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       <Question>hist: When did Paul Ehrlich develop a chemotherapy against syphilis?</Question>
       <Answer>1909</Answer>
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     <LearningData>
         <Interval>1319</Interval>
         <Repetitions>1</Repetitions>
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   <SuperMemoElement>
     <ElementID>40411</ElementID>
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       <Question>hist: Whose famous Master's Thesis was nearly rejected?</Question>
       <Answer>Arrhenius'es (theory of dissociation)</Answer>
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     <LearningData>
         <Interval>1847</Interval>
         <Repetitions>7</Repetitions>
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   <SuperMemoElement>
     <ElementID>40622</ElementID>
     <Content>
       <Question>hist: When was petroleum industry born?</Question>
       <Answer>mid 19-th century</Answer>
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     <LearningData>
         <Interval>1055</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>41746</ElementID>
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       <Question>hist: What was the CIA's aid to Afghan rebels during the war with the Soviets?</Question>
       <Answer>$3 bn (total)</Answer>
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     <LearningData>
         <Interval>1116</Interval>
         <Repetitions>6</Repetitions>
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   <SuperMemoElement>
     <ElementID>74548</ElementID>
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       <Question>hist: In 1945 Croatia was rejoined with ..., which became a people's republic ruled by Josip Broz Tito (a Croat)</Question>
       <Answer>Yugoslavia</Answer>
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     <LearningData>
         <Interval>992</Interval>
         <Repetitions>6</Repetitions>
         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>162622</ElementID>
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       <Question>hist: Hammurabi, the king of Babylonia (18th century BC), developed one of the earliest systematic collections of [...]: the Code of Hammurabi</Question>
       <Answer>laws</Answer>
     </Content>
     <LearningData>
         <Interval>554</Interval>
         <Repetitions>2</Repetitions>
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     <ElementID>64440</ElementID>
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       <Question>hist: When did Israel gain the control over Arab Jerusalem?</Question>
       <Answer>during six-day war (1967)</Answer>
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     <LearningData>
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   <SuperMemoElement>
     <ElementID>40470</ElementID>
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       <Question>hist: Who invented alkaline storage battery?</Question>
       <Answer>Edison</Answer>
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   <SuperMemoElement>
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       <Question>hist: The negative aspects of Crusades: They hardened Muslim attitudes toward Christians, raised doubts about ...'s will, the church's authority, and the role of the papacy</Question>
       <Answer>God</Answer>
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     <LearningData>
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   <SuperMemoElement>
     <ElementID>139954</ElementID>
     <Content>
       <Question>hist: The first president of the United States to resign from office was [...]</Question>
       <Answer>Richard M. Nixon (1974)</Answer>
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   <SuperMemoElement>
     <ElementID>57216</ElementID>
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       <Question>hist: Who has lavishly rebuilt Rome after the great fire of 64 AD?</Question>
       <Answer><![CDATA[<A class=internal title=Nero href="http://www.wikipedia.org/wiki/Nero">Nero</A>]]></Answer>
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   <SuperMemoElement>
     <ElementID>57204</ElementID>
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       <Question>hist: What was the name of Nero's mother?</Question>
       <Answer>Agrippina (sister of Caligula)</Answer>
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         <Interval>1351</Interval>
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   <SuperMemoElement>
     <ElementID>208641</ElementID>
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       <Question>hist: The Eastern Roman Empire ([...] Empire) continued until 1453</Question>
       <Answer>Byzantine</Answer>
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     <ElementID>57202</ElementID>
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       <Question>hist: In which century did Nero rule?</Question>
       <Answer>1-st (ruled 54-68)</Answer>
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     <LearningData>
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   <SuperMemoElement>
     <ElementID>40487</ElementID>
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       <Question>hist: When did Alexandria in Egypt replace Athens as the center of science?</Question>
       <Answer>4th century BC</Answer>
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     <LearningData>
         <Interval>905</Interval>
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         <Lapses>3</Lapses>
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   <SuperMemoElement>
     <ElementID>108724</ElementID>
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       <Question>hist: In Northern Ireland, most Protestants are [Nationalist/Unionist] in political outlook</Question>
       <Answer>Unionist</Answer>
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     <LearningData>
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     <ElementID>73193</ElementID>
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       <Question>hist: Which countries joined the European Union in 1995?</Question>
       <Answer>Austria, Finland and Sweden</Answer>
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     <LearningData>
         <Interval>929</Interval>
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         <Lapses>2</Lapses>
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   <SuperMemoElement>
     <ElementID>40669</ElementID>
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       <Question>hist: What was the world's greatest sustained combat before WW1?</Question>
       <Answer>(American) Civil War (1861-1865)</Answer>
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         <Interval>1281</Interval>
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   <SuperMemoElement>
     <ElementID>67259</ElementID>
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       <Question>hist: The ... were Christian military expeditions undertaken in the 11th-14th century to recapture the Holy Land from the Muslims</Question>
       <Answer>Crusades</Answer>
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     <LearningData>
         <Interval>1034</Interval>
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         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>64426</ElementID>
     <Content>
       <Question>hist: In 1956, Nasser nationalized the Suez Canal Company. His action provoked an ... invasion of the Sinai Peninsula</Question>
       <Answer>Israeli</Answer>
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     <LearningData>
         <Interval>1307</Interval>
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     <ElementID>67314</ElementID>
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       <Question>hist: The Vikings were seafarers from ...(lands) who spread through Europe and the North Atlantic in 800-1100</Question>
       <Answer>Scandinavia</Answer>
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     <LearningData>
         <Interval>1088</Interval>
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   <SuperMemoElement>
     <ElementID>40530</ElementID>
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       <Question>hist: When was education born?</Question>
       <Answer>3rd millennium BC (Egypt and Sumer)</Answer>
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     <LearningData>
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   <SuperMemoElement>
     <ElementID>64836</ElementID>
     <Content>
       <Question>hist: Does Sweden belong to the EU (1999)?</Question>
       <Answer>yes (it joined in 1995)</Answer>
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     <LearningData>
         <Interval>445</Interval>
         <Repetitions>6</Repetitions>
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   <SuperMemoElement>
     <ElementID>214667</ElementID>
     <Content>
       <Question><![CDATA[hist: Which country had the first codified constitution in Europe?<FONT style="BACKGROUND-COLOR: #ffb0ff" color=#d9006c size=2><EM><BR></SUPERMEMOREFERENCE></EM></FONT>]]></Question>
       <Answer>Poland</Answer>
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   <SuperMemoElement>
     <ElementID>67302</ElementID>
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       <Question>hist: What major battle stopped the progress of Teutonic Knights to the east along the Baltic coast?</Question>
       <Answer>Battle of Tannenberg (against Polish-Lithuenian forces)(July 15, 1410)</Answer>
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     <LearningData>
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   <SuperMemoElement>
     <ElementID>40595</ElementID>
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       <Question>hist: Which great philosopher died in 1883 in poor health and in poverty, shortly after losing his wife and his daughter?</Question>
       <Answer>Karl Marx</Answer>
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     <LearningData>
         <Interval>1609</Interval>
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         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>77380</ElementID>
     <Content>
       <Question>hist: The precise molecular structure of DNA was determined in [...](year) by James D. Watson and Francis H.C. Crick</Question>
       <Answer>1953</Answer>
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     <LearningData>
         <Interval>876</Interval>
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   <SuperMemoElement>
     <ElementID>81459</ElementID>
     <Content>
       <Question>hist: As devised by the French Academy of Sciences in 1790s, the basic unit of the [...] system was the meter</Question>
       <Answer>metric</Answer>
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     <LearningData>
         <Interval>1313</Interval>
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       <Question>hist: The first railway was opened for public use in [...](year)</Question>
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       <Question>hist: 1990-1991, [...](b. 1931) was President of the Soviet Union until its dismantlement</Question>
       <Answer><![CDATA[<A class=internal title="Mikhail Gorbachev" href="http://www.wikipedia.org/wiki/Mikhail_Gorbachev">Mikhail Gorbachev</A>]]></Answer>
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       <Question>hist: Years before ...(institution) was officially abolished in Venezuela, Simon Bolivar liberated his own slaves</Question>
       <Answer>slavery</Answer>
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       <Question>hist: 1957: USSR launches Sputnik, the first [...]</Question>
       <Answer>artificial earth satellite</Answer>
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       <Question>hist: [...] was the first Republican to become US president</Question>
       <Answer>Abraham Lincoln (1809-1865)</Answer>
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       <Question>hist: During Vietnam War, ...(substance) was used to clear the jungle, depriving the Viet Cong of cover as well as rice</Question>
       <Answer>Agent Orange</Answer>
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       <Question>hist: What was the name of Caligula's sister who married Claudius?</Question>
       <Answer>Agrippina</Answer>
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       <Question>hist: On ... 6, 1944, 150,000 allied troops disembarked at Normandy to open the western front in WW2</Question>
       <Answer>June</Answer>
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       <Question>hist: India and Pakistan became separate states when the British granted India [...] in 1947</Question>
       <Answer>independence</Answer>
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       <Question>hist: India and Pakistan became separate states when the British granted [...] its independence in 1947</Question>
       <Answer>India</Answer>
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       <Question>hist: Leibnitz published his [...] methods in 1684, and was immediately accused of plagiarism by Newton</Question>
       <Answer>calculus</Answer>
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       <Question>hist: In 1956, President ... nationalized the Suez Canal Company</Question>
       <Answer>Nasser</Answer>
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     <LearningData>
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     <ElementID>59165</ElementID>
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       <Question>hist: The Great Depression and the Republicans' inability to take action against it swept the Democratic Party back to power in 1932 under the candidacy of [...]</Question>
       <Answer>Franklin D. Roosevelt</Answer>
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     <LearningData>
         <Interval>1155</Interval>
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       <Question>hist: ... conference in 1954 divided Vietnam into communist north and the southern part</Question>
       <Answer>Geneva</Answer>
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     <LearningData>
         <Interval>1029</Interval>
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     <ElementID>73054</ElementID>
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       <Question>hist: Prohibition in the US was enacted by 18th Amendment in 1919, and abolished in ... by 21st</Question>
       <Answer>1933</Answer>
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     <ElementID>64767</ElementID>
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       <Question>hist: With the breakup of the Ottoman Empire after WW1, ...(country) agreed to the establishment of an independent Kurdistan under the Treaty of Sevres (1920)</Question>
       <Answer>Turkey</Answer>
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     <LearningData>
         <Interval>1044</Interval>
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       <Question>hist: In ...(year), Microsoft, the unofficial partnership of Bill Gates and Paul Allen, achieves sales of $16,000</Question>
       <Answer>1975</Answer>
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       <Question>hist: With the breakup of the Ottoman Empire after ...(war), Turkey agreed to the establishment of an independent Kurdistan under the Treaty of Sevres.</Question>
       <Answer>WW1</Answer>
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       <Question>hist: Crowning the Magellan mission, the Victoria dropped anchor in the harbor of Seville on Sept. 9, [...]</Question>
       <Answer>1522</Answer>
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     <LearningData>
         <Interval>1154</Interval>
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     <ElementID>40480</ElementID>
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       <Question>hist: What did Ivan Petrovich Pavlov get Nobel Prize for in 1904?</Question>
       <Answer>his work on digestion (i.e. not on conditioning)</Answer>
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     <LearningData>
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     <ElementID>73146</ElementID>
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       <Question>hist: In 1971, the first speech-recognition software, Hearsay, was developed in ...(country)</Question>
       <Answer>India</Answer>
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         <Interval>1165</Interval>
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       <Question>hist: In 1953 IBM manufactured its model 650 (the first mass-produced computer), and sold 1500 units before taking it off the market in ...(year)</Question>
       <Answer>1969</Answer>
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       <Question>hist: Communist leader Ho Chi Minh organized resistance against the Japanese and in 1945 declared ...(country) an independent republic</Question>
       <Answer>Vietnam</Answer>
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       <Question>hist: In 1941, Hitler's three pronged attack against the USSR targeted: Leningrad in the north, ... in the middle and Stalingrad in the south</Question>
       <Answer>Moscow</Answer>
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       <Answer>George Boole</Answer>
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       <Question>hist: What was the value of oil burnt in Kuwaiti oil-fields in one month (lit by Saddam during the Gulf War 1991)?</Question>
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       <Question>hist: In Aug 1964, a US destroyer had a minor clash with North Vietnamese in the ... The Congress accepted military retaliation</Question>
       <Answer>Gulf of Tonkin</Answer>
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       <Question>hist: 1,200 BC: [...] is the most widely and longest used currency in history</Question>
       <Answer>Cowrie Shells</Answer>
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       <Question>hist: In 1939, the League of Nations condemned the USSR for its invasion of ... and expelled it</Question>
       <Answer>Finland</Answer>
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       <Question>hist:  In 1939, the ...(organization) condemned the USSR for its invasion of Finland and expelled it</Question>
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       <Answer>arcade game</Answer>
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       <Question>hist: Are there many examples of pioneers being taken over by the "fast second" in the history of invention?</Question>
       <Answer>hundreds</Answer>
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       <Question>hist: How did Claudius die (54 AD)?</Question>
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       <Question>hist: What was the speed of the first car (built by Karl Benz in 1886)?</Question>
       <Answer>13 km/h</Answer>
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       <Question>hist: Who was first to develop immunization against smallpox (long before E.Jenner)?</Question>
       <Answer>ancient Chinese (3rd century BC)</Answer>
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       <Question>hist: On [...](day), 1939, Germany invaded Poland, forcing Britain and France to declare war</Question>
       <Answer>Sept. 1</Answer>
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       <Question>hist: Kosovo is held by many Serbs to be the religious heart of Eastern ...</Question>
       <Answer>Orthodox (Christian) Serbia</Answer>
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       <Question>hist: What happened to the first wife of Mao Tse-tung?</Question>
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       <Question>hist: In 476 Romulus Augustulus was deposed by the barbarian leader [...]. The Roman Empire was at an end</Question>
       <Answer>Odoacer</Answer>
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       <Question>hist: On July 23, 1914 Austria presented an ultimatum to Serbia. On July 28, [...] it declared war on Serbia</Question>
       <Answer>1914</Answer>
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       <Question>hist: What were the two main factors of scientific revival in Renaissance?</Question>
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       <Question>hist: Who proposed a computer with a program kept in memory?</Question>
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       <Question>hist: What sentence did the Vichy Government court pass on Charles de Gaulle for his call to resist German occupation (1940)?</Question>
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       <Answer>European</Answer>
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       <Answer>confiscation</Answer>
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       <Question>hist: Did Mendel ever realize the importance of his findings?</Question>
       <Answer>no (he died 14 years before Hugo De Vries rediscovered his writings in 1900)</Answer>
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   <SuperMemoElement>
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       <Question>hist: Which school of psychology did Pavlov criticize severely: French, German, or American?</Question>
       <Answer>all of them</Answer>
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     <LearningData>
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   <SuperMemoElement>
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       <Question>hist: In 1918 Croatia was proclaimed independent from Hungary and Austria, and it entered into a union: the Kingdom of Serbs, Croats, and Slovenes. The new state was renamed ... in 1929, with King Alexander</Question>
       <Answer>Yugoslavia</Answer>
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     <LearningData>
         <Interval>1337</Interval>
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         <Lapses>0</Lapses>
         <LastRepetition>16.07.2000</LastRepetition>
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   <SuperMemoElement>
     <ElementID>40559</ElementID>
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       <Question>hist: Who discovered the structure of protein alpha-helix?</Question>
       <Answer>Linus Pauling (early 1950s)</Answer>
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     <LearningData>
         <Interval>1176</Interval>
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         <Lapses>0</Lapses>
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   <SuperMemoElement>
     <ElementID>110982</ElementID>
     <Content>
       <Question>hist: Factors of the Great Depression: An [...] distribution of incomes limited the consumer goods market</Question>
       <Answer>unequal</Answer>
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     <LearningData>
         <Interval>952</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>21.07.2001</LastRepetition>
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     <ElementID>74279</ElementID>
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       <Question>hist: In 1914, the rulers of Europe, after a ...(period) of huge economic progress and a decade of rising tensions, started WW1</Question>
       <Answer>century</Answer>
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   <SuperMemoElement>
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       <Question>hist: Treaty of Versailles: Poland, [...] and Finland were formed from land lost by Russia</Question>
       <Answer>the Baltics (i.e. Lithuania, Latvia, and Estonia)</Answer>
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     <LearningData>
         <Interval>676</Interval>
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         <Lapses>3</Lapses>
         <LastRepetition>07.04.2002</LastRepetition>
         <AFactor>2.212</AFactor>
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   <SuperMemoElement>
     <ElementID>110278</ElementID>
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       <Question>hist: Responding to growing anti-Semitism in [...](area) in the 19th century, Jews founded Zionism to re-create their homeland in Palestine</Question>
       <Answer>Europe</Answer>
     </Content>
     <LearningData>
         <Interval>799</Interval>
         <Repetitions>3</Repetitions>
         <Lapses>1</Lapses>
         <LastRepetition>06.12.2001</LastRepetition>
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   <SuperMemoElement>
     <ElementID>40587</ElementID>
     <Content>
       <Question>hist: Who developed the idea of a stored program computer?</Question>
       <Answer>John von Neumann (1945)</Answer>
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     <LearningData>
         <Interval>2799</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>0</Lapses>
         <LastRepetition>27.07.2003</LastRepetition>
         <AFactor>5.911</AFactor>
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       <Question>hist: During WW2, by May ..., the Germans and their Axis allies dominated almost all of the non-Soviet European continent</Question>
       <Answer>1941</Answer>
     </Content>
     <LearningData>
         <Interval>804</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>4</Lapses>
         <LastRepetition>23.12.2001</LastRepetition>
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   <SuperMemoElement>
     <ElementID>74233</ElementID>
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       <Question>hist: China was printing by the 8th century, and using a form of movable type by the ...th</Question>
       <Answer>11 (four centuries before J. Gutenberg invented the cast-metal version)</Answer>
     </Content>
     <LearningData>
         <Interval>915</Interval>
         <Repetitions>9</Repetitions>
         <Lapses>3</Lapses>
         <LastRepetition>27.08.2001</LastRepetition>
         <AFactor>2.632</AFactor>
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   <SuperMemoElement>
     <ElementID>82548</ElementID>
     <Content>
       <Question>hist: Great [...]: On Oct. 24, 1929, the complete collapse of the stock market began. October 29 extended the damage</Question>
       <Answer>Depression</Answer>
     </Content>
     <LearningData>
         <Interval>817</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>1</Lapses>
         <LastRepetition>28.11.2001</LastRepetition>
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   <SuperMemoElement>
     <ElementID>65767</ElementID>
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       <Question>hist: Who got a Nobel Prize for sending radio signals over the Atlantic in 1901?</Question>
       <Answer>Marconi (in 1909)(even though it was Tesla who invented the radio)</Answer>
     </Content>
     <LearningData>
         <Interval>926</Interval>
         <Repetitions>7</Repetitions>
         <Lapses>1</Lapses>
         <LastRepetition>23.07.2001</LastRepetition>
         <AFactor>1.779</AFactor>
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     <ElementID>190903</ElementID>
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       <Question>hist: In 1099 the First Crusade captured Jerusalem from the Muslims. In [...] Saladin took it back</Question>
       <Answer>1187</Answer>
     </Content>
     <LearningData>
         <Interval>118</Interval>
         <Repetitions>2</Repetitions>
         <Lapses>1</Lapses>
         <LastRepetition>12.10.2003</LastRepetition>
         <AFactor>1.962</AFactor>
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