entrigna/custom-qa-v2-train-ds huggingface dataset:
Context: 

Hydrogen gas forms explosive mixtures with air if it is 4–74% concentrated and with chlorine if it is 5–95% concentrated. The mixtures may be ignited by spark, heat or sunlight. The hydrogen autoignition temperature, the temperature of spontaneous ignition in air, is 500 °C (932 °F). Pure hydrogen-oxygen flames emit ultraviolet light and with high oxygen mix are nearly invisible to the naked eye, as illustrated by the faint plume of the Space Shuttle Main Engine compared to the highly visible plume of a Space Shuttle Solid Rocket Booster. The detection of a burning hydrogen leak may require a flame detector; such leaks can be very dangerous. Hydrogen flames in other conditions are blue, resembling blue natural gas flames. The destruction of the Hindenburg airship was an infamous example of hydrogen combustion; the cause is debated, but the visible orange flames were the result of a rich mixture of hydrogen to oxygen combined with carbon compounds from the airship skin.

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Question: What kind of light do hydrogen-oxygen flames make?
Answer: ultraviolet light.
Context: 

Chopin's qualities as a pianist and composer were recognized by many of his fellow musicians. Schumann named a piece for him in his suite Carnaval, and Chopin later dedicated his Ballade No. 2 in F major to Schumann. Elements of Chopin's music can be traced in many of Liszt's later works. Liszt later transcribed for piano six of Chopin's Polish songs. A less fraught friendship was with Alkan, with whom he discussed elements of folk music, and who was deeply affected by Chopin's death.

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Question: How many of Chopin's Polish songs did Liszt transliterate for piano?
Answer: six.
Context: 

In an interview published by Vogue in April 2013, Beyoncé was asked if she considers herself a feminist, to which she said, "that word can be very extreme... But I guess I am a modern-day feminist. I do believe in equality". She would later align herself more publicly with the movement, sampling "We should all be feminists", a speech delivered by Nigerian author Chimamanda Ngozi Adichie at a TEDxEuston conference in April 2013, in her song "Flawless", released later that year. She has also contributed to the Ban Bossy campaign, which uses television and social media to encourage leadership in girls.

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Question: Beyoncé used words from which Nigerian author in her song, Flawless?
Answer: Chimamanda Ngozi Adichie.
Context: 

In April 1950, Stalin gave Kim permission to invade the South under the condition that Mao would agree to send reinforcements if they became needed. Stalin made it clear that Soviet forces would not openly engage in combat, to avoid a direct war with the Americans. Kim met with Mao in May 1950. Mao was concerned that the Americans would intervene but agreed to support the North Korean invasion. China desperately needed the economic and military aid promised by the Soviets. At that time, the Chinese were in the process of demobilizing half of the PLA's 5.6 million soldiers. However, Mao sent more ethnic Korean PLA veterans to Korea and promised to move an army closer to the Korean border. Once Mao's commitment was secured, preparations for war accelerated.

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Question: Who did the Soviets not want to engage in conflict?
Answer: the Americans.
Context: 

In 2012, President Rachide Sambu-balde Malam Bacai Sanhá died. He belonged to PAIGC (African Party for the Independence of Guinea and Cape Verde), one of the two major political parties in Guinea-Bissau, along with the PRS (Party for Social Renewal). There are more than 20 minor parties.

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Question: When did President Sanha die?
Answer: 2012.
Context: 

Because the states were preexisting political entities, the U.S. Constitution did not need to define or explain federalism in any one section but it often mentions the rights and responsibilities of state governments and state officials in relation to the federal government. The federal government has certain express powers (also called enumerated powers) which are powers spelled out in the Constitution, including the right to levy taxes, declare war, and regulate interstate and foreign commerce. In addition, the Necessary and Proper Clause gives the federal government the implied power to pass any law "necessary and proper" for the execution of its express powers. Other powers—the reserved powers—are reserved to the people or the states. The power delegated to the federal government was significantly expanded by the Supreme Court decision in McCulloch v. Maryland (1819), amendments to the Constitution following the Civil War, and by some later amendments—as well as the overall claim of the Civil War, that the states were legally subject to the final dictates of the federal government.

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Question: What is another word for express powers? 
Answer: enumerated powers.
Context: 

The almost constant wars among the Sumerian city-states for 2000 years helped to develop the military technology and techniques of Sumer to a high level. The first war recorded in any detail was between Lagash and Umma in c. 2525 BC on a stele called the Stele of the Vultures. It shows the king of Lagash leading a Sumerian army consisting mostly of infantry. The infantrymen carried spears, wore copper helmets, and carried rectangular shields. The spearmen are shown arranged in what resembles the phalanx formation, which requires training and discipline; this implies that the Sumerians may have made use of professional soldiers.

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Question: What did the king of Lagash's army mostly consist of?
Answer: infantry.
Context: 

In 1987, in Canada, Elizabeth publicly supported politically divisive constitutional amendments, prompting criticism from opponents of the proposed changes, including Pierre Trudeau. The same year, the elected Fijian government was deposed in a military coup. Elizabeth, as monarch of Fiji, supported the attempts of the Governor-General, Ratu Sir Penaia Ganilau, to assert executive power and negotiate a settlement. Coup leader Sitiveni Rabuka deposed Ganilau and declared Fiji a republic. By the start of 1991, republican feeling in Britain had risen because of press estimates of the Queen's private wealth—which were contradicted by the Palace—and reports of affairs and strained marriages among her extended family. The involvement of the younger royals in the charity game show It's a Royal Knockout was ridiculed and the Queen was the target of satire.

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Question: When did Elizabeth support constitutional amendments in Canada?
Answer: 1987.
Context: 

The England national football team represents England and the Crown Dependencies of Jersey, Guernsey and the Isle of Man for football matches as part of FIFA-authorised events, and is controlled by The Football Association, the governing body for football in England. England are one of the two oldest national teams in football; alongside Scotland, whom they played in the world's first international football match in 1872. England's home ground is Wembley Stadium, London, and the current team manager is Roy Hodgson.

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Question: Which governing body controls the England national football team?
Answer: The Football Association.
Context: 

Any philosophy that assigns crucial importance to the ideal or spiritual realm in its account of human existence may be termed "idealist". Metaphysical idealism is an ontological doctrine that holds that reality itself is incorporeal or experiential at its core. Beyond this, idealists disagree on which aspects of the mental are more basic. Platonic idealism affirms that abstractions are more basic to reality than the things we perceive, while subjective idealists and phenomenalists tend to privilege sensory experience over abstract reasoning. Epistemological idealism is the view that reality can only be known through ideas, that only psychological experience can be apprehended by the mind.

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Question: What branch of idealism believes that we can only know the real world via ideas?
Answer: Epistemological.
Context: 

The only words of Jesus on the cross in the Mark and Matthew accounts, this is a quotation of Psalm 22. Since other verses of the same Psalm are cited in the crucifixion accounts, it is often considered a literary and theological creation. Geza Vermes, however, points out that the verse is cited in Aramaic rather than the Hebrew in which it usually would have been recited, and suggests that by the time of Jesus, this phrase had become a proverbial saying in common usage. Compared to the accounts in the other Gospels, which he describes as 'theologically correct and reassuring', he considers this phrase 'unexpected, disquieting and in consequence more probable'. He describes it as bearing 'all the appearances of a genuine cry'. Raymond Brown likewise comments that he finds 'no persuasive argument against attributing to the Jesus of Mark/Matt the literal sentiment of feeling forsaken expressed in the Psalm quote'.

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Question: What was the psalm said to be in Jesus' time?
Answer: a proverbial saying in common usage.
Context: 

In ancient India, literature originated from stories that were originally orally transmitted. Early genres included drama, fables, sutras and epic poetry. Sanskrit literature begins with the Vedas, dating back to 1500–1000 BCE, and continues with the Sanskrit Epics of Iron Age India. The Vedas are among the oldest sacred texts. The Samhitas (vedic collections) date to roughly 1500–1000 BCE, and the "circum-Vedic" texts, as well as the redaction of the Samhitas, date to c. 1000-500 BCE, resulting in a Vedic period, spanning the mid 2nd to mid 1st millennium BCE, or the Late Bronze Age and the Iron Age. The period between approximately the 6th to 1st centuries BC saw the composition and redaction of the two most influential Indian epics, the Mahabharata and the Ramayana, with subsequent redaction progressing down to the 4th century AD.

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Question: What were some different genres that emerged from ancient India's oral literary traditions?
Answer: drama, fables, sutras and epic poetry.
Context: 

Brigham Young University's origin can be traced back to 1862 when a man named Warren Dusenberry started a Provo school in a prominent adobe building called Cluff Hall, which was located in the northeast corner of 200 East and 200 North. On October 16, 1875, Brigham Young, then president of the LDS Church, personally purchased the Lewis Building after previously hinting that a school would be built in Draper, Utah in 1867. Hence, October 16, 1875 is commonly held as BYU's founding date. Said Young about his vision: "I hope to see an Academy established in Provo... at which the children of the Latter-day Saints can receive a good education unmixed with the pernicious atheistic influences that are found in so many of the higher schools of the country."

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Question: Where was Brigham  Young's school originally believed to be located?
Answer: Draper, Utah.
Context: 

Carbon metabolism in bacteria is either heterotrophic, where organic carbon compounds are used as carbon sources, or autotrophic, meaning that cellular carbon is obtained by fixing carbon dioxide. Heterotrophic bacteria include parasitic types. Typical autotrophic bacteria are phototrophic cyanobacteria, green sulfur-bacteria and some purple bacteria, but also many chemolithotrophic species, such as nitrifying or sulfur-oxidising bacteria. Energy metabolism of bacteria is either based on phototrophy, the use of light through photosynthesis, or based on chemotrophy, the use of chemical substances for energy, which are mostly oxidised at the expense of oxygen or alternative electron acceptors (aerobic/anaerobic respiration).

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Question: When carbon metabolism is called autotrophic?
Answer: cellular carbon is obtained by fixing carbon dioxide.
Context: 

The major agricultural product is rice, which covers about 60% of the country's total cultivated land area. Rice accounts for 97% of total food grain production by weight. Through collaboration with the International Rice Research Institute 52 modern rice varieties were released in the country between 1966 and 1997, helping increase national rice production to 14 million tons in 1987 and to 19 million tons in 1996. By 1988, modern varieties were planted on half of the country's ricelands, including 98 percent of the irrigated areas. In 2008 rice production was estimated at 50 million tons.

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Question: How is production in the category tallied ?
Answer: by weight.
Context: 

Yet another may have been a reduction in the real-estate listings and property-related financial services (such as mortgage loans or insurance policies) offered in some areas of the Bronx — a process known as redlining. Others have suggested a "planned shrinkage" of municipal services, such as fire-fighting. There was also much debate as to whether rent control laws had made it less profitable (or more costly) for landlords to maintain existing buildings with their existing tenants than to abandon or destroy those buildings.

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Question: What is redlining?
Answer: a reduction in the real-estate listings and property-related financial services (such as mortgage loans or insurance policies) offered in some areas.
Context: 

Although most often associated with the People's Republic of China, character simplification predates the 1949 communist victory. Caoshu, cursive written text, almost always includes character simplification, and simplified forms have always existed in print, albeit not for the most formal works. In the 1930s and 1940s, discussions on character simplification took place within the Kuomintang government, and a large number of Chinese intellectuals and writers have long maintained that character simplification would help boost literacy in China. Indeed, this desire by the Kuomintang to simplify the Chinese writing system (inherited and implemented by the Communist Party of China) also nursed aspirations of some for the adoption of a phonetic script based on the Latin script, and spawned such inventions as the Gwoyeu Romatzyh.

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Question: What almost always includes character simplification?
Answer: Caoshu.
Context: 

In 2005, the company sold its personal computer business to Chinese technology company Lenovo, and in the same year it agreed to acquire Micromuse. A year later IBM launched Secure Blue, a low-cost hardware design for data encryption that can be built into a microprocessor. In 2009 it acquired software company SPSS Inc. Later in 2009, IBM's Blue Gene supercomputing program was awarded the National Medal of Technology and Innovation by U.S. President Barack Obama. In 2011, IBM gained worldwide attention for its artificial intelligence program Watson, which was exhibited on Jeopardy! where it won against game-show champions Ken Jennings and Brad Rutter. As of 2012[update], IBM had been the top annual recipient of U.S. patents for 20 consecutive years.

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Question: SPSS Inc. was acquired in what year?
Answer: 2009.
Context: 

Electric recording which developed during the time that early radio was becoming popular (1925) benefited from the microphones and amplifiers used in radio studios. The early electric recordings were reminiscent tonally of acoustic recordings, except there was more recorded bass and treble as well as delicate sounds and overtones cut on the records. This was in spite of some carbon microphones used, which had resonances that colored the recorded tone. The double button carbon microphone with stretched diaphragm was a marked improvement. Alternatively, the Wente style condenser microphone used with the Western Electric licensed recording method had a brilliant midrange and was prone to overloading from sibilants in speech, but generally it gave more accurate reproduction than carbon microphones.

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Question: At at time was radio gaining popularity?
Answer: 1925.
Context: 

With the arrival of Francisco Vázquez de Coronado, a Spanish conquistador, the first recorded history of encounter between Europeans and Native Americans in the Great Plains occurred in Texas, Kansas and Nebraska from 1540-1542. In that same time period, Hernando de Soto crossed a west-northwest direction in what is now Oklahoma and Texas. Today this is known as the De Soto Trail. The Spanish thought the Great Plains were the location of the mythological Quivira and Cíbola, a place said to be rich in gold.

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Question: what did the spanish think the cities of Quivira and Cíbola were rich in?
Answer: gold.
Context: 

According to the Constitution of Estonia (Estonian: Põhiseadus) the supreme power of the state is vested in the people. The people exercise their supreme power of the state on the elections of the Riigikogu through citizens who have the right to vote. The supreme judicial power is vested in the Supreme Court or Riigikohus, with nineteen justices. The Chief Justice is appointed by the parliament for nine years on nomination by the president. The official Head of State is the President of Estonia, who gives assent to the laws passed by Riigikogu, also having the right of sending them back and proposing new laws.

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Question: What document declares supreme power for the people?
Answer: the Constitution of Estonia.
Context: 

Hebrew is the liturgical language of Judaism (termed lashon ha-kodesh, "the holy tongue"), the language in which most of the Hebrew scriptures (Tanakh) were composed, and the daily speech of the Jewish people for centuries. By the 5th century BCE, Aramaic, a closely related tongue, joined Hebrew as the spoken language in Judea. By the 3rd century BCE, some Jews of the diaspora were speaking Greek. Others, such as in the Jewish communities of Babylonia, were speaking Hebrew and Aramaic, the languages of the Babylonian Talmud. These languages were also used by the Jews of Israel at that time.[citation needed]

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Question: What is a closely related tongue to Hebrew?
Answer: Aramaic.
Context: 

Yale's residential college system was established in 1933 by Edward S. Harkness, who admired the social intimacy of Oxford and Cambridge and donated significant funds to found similar colleges at Yale and Harvard. Though Yale's colleges resemble their English precursors organizationally and architecturally, they are dependent entities of Yale College and have limited autonomy. The colleges are led by a master and an academic dean, who reside in the college, and university faculty and affiliates comprise each college's fellowship. Colleges offer their own seminars, social events, and speaking engagements known as "Master's Teas," but do not contain programs of study or academic departments. Instead, all undergraduate courses are taught by the Faculty of Arts and Sciences and are open to members of any college.

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Question: Who established Yale's residential college system?
Answer: Edward S. Harkness.
Context: 

The relatively recent increased consumption of sugar has been linked to the rise of some afflictions such as diabetes, obesity, and more recently heart disease. Increased consumption of sugar has been tied to these three, among others. Obesity levels have more than doubled in the last 30 years among adults, going from 15% to 35% in the United States. Obesity and diet also happen to be high risk factors for diabetes. In the same time span that obesity doubled, diabetes numbers quadrupled in America. Increased weight, especially in the form of belly fat, and high sugar intake are also high risk factors for heart disease. Both sugar intake and fatty tissue increase the probability of elevated LDL cholesterol in the bloodstream. Elevated amounts of Low-density lipoprotein (LDL) cholesterol, is the primary factor in heart disease. In order to avoid all the dangers of sugar, moderate consumption is paramount.

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Question: What has been the increase in obesity among adults in the last 30 years in the United States?
Answer: more than doubled.
Context: 

In addition to the sports he played at Yale, Kerry is described by Sports Illustrated, among others, as an "avid cyclist", primarily riding on a road bike. Prior to his presidential bid, Kerry was known to have participated in several long-distance rides (centuries). Even during his many campaigns, he was reported to have visited bicycle stores in both his home state and elsewhere. His staff requested recumbent stationary bikes for his hotel rooms. He has also been a snowboarder, windsurfer, and sailor.

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Question: What other sports does Kerry participate in?
Answer: snowboarder, windsurfer, and sailor.
Context: 

While forming an integral part of the Christian calendar, particularly in Catholic regions, many Carnival traditions resemble those antedating Christianity. Italian Carnival is sometimes thought to be derived from the ancient Roman festivals of Saturnalia and Bacchanalia. The Saturnalia, in turn, may be based on the Greek Dionysia and Oriental festivals. For the start of the Roman Saturnalia, on December 17 authorities chose an enemy of the Roman people to represent the Lord of Misrule in each community. These men and women were forced to indulge in food and physical pleasures throughout the week, horribly murdered on December 25th: "destroying the forces of darkness".

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Question: What happened to the men and women chosen to represent the Lord of Misrule?
Answer: horribly murdered.
Context: 

St Helena has long been known for its high proportion of endemic birds and vascular plants. The highland areas contain most of the 400 endemic species recognised to date. Much of the island has been identified by BirdLife International as being important for bird conservation, especially the endemic Saint Helena plover or wirebird, and for seabirds breeding on the offshore islets and stacks, in the north-east and the south-west Important Bird Areas. On the basis of these endemics and an exceptional range of habitats, Saint Helena is on the United Kingdom's tentative list for future UNESCO World Heritage Sites.

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Question:  Saint Helena is on the United Kingdom's list for future what?
Answer: UNESCO World Heritage Sites.
Context: 

Instructions are also embedded in fonts to tell the operating system how to properly output different character sequences. A simple solution to the placement of combining marks or diacritics is assigning the marks a width of zero and placing the glyph itself to the left or right of the left sidebearing (depending on the direction of the script they are intended to be used with). A mark handled this way will appear over whatever character precedes it, but will not adjust its position relative to the width or height of the base glyph; it may be visually awkward and it may overlap some glyphs. Real stacking is impossible, but can be approximated in limited cases (for example, Thai top-combining vowels and tone marks can just be at different heights to start with). Generally this approach is only effective in monospaced fonts, but may be used as a fallback rendering method when more complex methods fail.

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Question: Can real stacking be accomplished? 
Answer: Real stacking is impossible.
Context: 

The D-Day Normandy landings on June 6, 1944, were costly but successful. A month later, the invasion of Southern France took place, and control of forces in the southern invasion passed from the AFHQ to the SHAEF. Many prematurely considered that victory in Europe would come by summer's end—however the Germans did not capitulate for almost a year. From then until the end of the war in Europe on May 8, 1945, Eisenhower, through SHAEF, commanded all Allied forces, and through his command of ETOUSA had administrative command of all U.S. forces on the Western Front north of the Alps. He was ever mindful of the inevitable loss of life and suffering that would be experienced on an individual level by the troops under his command and their families. This prompted him to make a point of visiting every division involved in the invasion. Eisenhower's sense of responsibility was underscored by his draft of a statement to be issued if the invasion failed. It has been called one of the great speeches of history:

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Question: How many divisions involved in the Allied invasion of Europe did Eisenhower visit?
Answer: every.