Problem: Detroit:

Long a major population center and site of worldwide automobile manufacturing, Detroit has suffered a long economic decline produced by numerous factors. Like many industrial American cities, Detroit reached its population peak in the 1950 census. The peak population was 1.8 million people. Following suburbanization, industrial restructuring, and loss of jobs (as described above), by the 2010 census, the city had less than 40 percent of that number, with just over 700,000 residents. The city has declined in population in each census since 1950.

By how much in percent has the population of Detroit declined since 1950?
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A: 40

Problem: The Ghoomar dance from Jodhpur Marwar and Kalbeliya dance of Jaisalmer have gained international recognition. Folk music is a large part of Rajasthani culture. Kathputli, Bhopa, Chang, Teratali, Ghindr, Kachchhighori, and Tejaji are examples of traditional Rajasthani culture. Folk songs are commonly ballads which relate heroic deeds and love stories; and religious or devotional songs known as bhajans and banis which are often accompanied by musical instruments like dholak, sitar, and sarangi are also sung.
What are examples of the Ghoomar dance?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The city is home to several colleges and universities. Oklahoma City University, formerly known as Epworth University, was founded by the United Methodist Church on September 1, 1904 and is renowned for its performing arts, science, mass communications, business, law, and athletic programs. OCU has its main campus in the north-central section of the city, near the city's chinatown area. OCU Law is located in the Midtown district near downtown, in the old Central High School building.
What was the original name of Oklahoma City University?
A: Epworth University

Context and question: In the West, the ancient Greeks initially regarded the best form of government as rule by the best men. Plato advocated a benevolent monarchy ruled by an idealized philosopher king, who was above the law. Plato nevertheless hoped that the best men would be good at respecting established laws, explaining that "Where the law is subject to some other authority and has none of its own, the collapse of the state, in my view, is not far off; but if law is the master of the government and the government is its slave, then the situation is full of promise and men enjoy all the blessings that the gods shower on a state." More than Plato attempted to do, Aristotle flatly opposed letting the highest officials wield power beyond guarding and serving the laws. In other words, Aristotle advocated the rule of law:
Who did Aristotle envision ruling a benevolent monarchy?
Answer: unanswerable

Question: In January 2016, the Eton College beagling club was accused by the League Against Cruel Sports of undertaking an illegal hare hunt. The allegations were accompanied by a video of the Eton Beagles chasing a hare, as 'the hunt staff urge the beagles on and make no efforts to call the dogs off.' A spokesman representing Eton College released the following statement: "Eton College takes its legal responsibilities extremely seriously and expects all school activities to comply with the law. We are investigating this allegation as a matter of urgency and will be co-operating fully with the relevant authorities."
Is there an answer to this question: What was Eton's beagle club accused of in January 2016?

Answer: an illegal hare hunt

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
There are many styles of mandolin, but four are common, the Neapolitan or round-backed mandolin, the carved-top mandolin and the flat-backed mandolin. The round-back has a deep bottom, constructed of strips of wood, glued together into a bowl. The carved-top or arch-top mandolin has a much shallower, arched back, and an arched topboth carved out of wood. The flat-backed mandolin uses thin sheets of wood for the body, braced on the inside for strength in a similar manner to a guitar. Each style of instrument has its own sound quality and is associated with particular forms of music. Neapolitan mandolins feature prominently in European classical music and traditional music. Carved-top instruments are common in American folk music and bluegrass music. Flat-backed instruments are commonly used in Irish, British and Brazilian folk music. Some modern Brazilian instruments feature an extra fifth course tuned a fifth lower than the standard fourth course.
Which form of music do Neapolitan mandolins feature?
A:
European classical music and traditional music.