Problem: Israel:

In 586 BCE King Nebuchadnezzar II of Babylon conquered Judah. According to the Hebrew Bible, he destroyed Solomon's Temple and exiled the Jews to Babylon. The defeat was also recorded by the Babylonians (see the Babylonian Chronicles). In 538 BCE, Cyrus the Great of Persia conquered Babylon and took over its empire. Cyrus issued a proclamation granting subjugated nations (including the people of Judah) religious freedom (for the original text, which corroborates the biblical narrative only in very broad terms, see the Cyrus Cylinder). According to the Hebrew Bible 50,000 Judeans, led by Zerubabel, returned to Judah and rebuilt the temple. A second group of 5,000, led by Ezra and Nehemiah, returned to Judah in 456 BCE although non-Jews wrote to Cyrus to try to prevent their return.

How many Judeans did Zerubabel return to Judah?
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A: 50,000

Problem: The history of phonology may be traced back to the Ashtadhyayi, the Sanskrit grammar composed by Panini in the 4th century BC. In particular the Shiva Sutras, an auxiliary text to the Ashtadhyayi, introduces what can be considered a list of the phonemes of the Sanskrit language, with a notational system for them that is used throughout the main text, which deals with matters of morphology, syntax and semantics.
What type of grammar was phonology first a part of?
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Answer: Sanskrit

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
While many secular buildings exist from the Late Middle Ages, it is in the buildings of cathedrals and great churches that Gothic architecture displays its pertinent structures and characteristics to the fullest advantage. A Gothic cathedral or abbey was, prior to the 20th century, generally the landmark building in its town, rising high above all the domestic structures and often surmounted by one or more towers and pinnacles and perhaps tall spires. These cathedrals were the skyscrapers of that day and would have been the largest buildings by far that Europeans would ever have seen. It is in the architecture of these Gothic churches that a unique combination of existing technologies established the emergence of a new building style. Those technologies were the ogival or pointed arch, the ribbed vault, and the buttress.
What is an example of impossible technology that is seen in Gothic construction?
A: unanswerable

Context and question: Shell's primary business is the management of a vertically integrated oil company. The development of technical and commercial expertise in all stages of this vertical integration, from the initial search for oil (exploration) through its harvesting (production), transportation, refining and finally trading and marketing established the core competencies on which the company was founded. Similar competencies were required for natural gas, which has become one of the most important businesses in which Shell is involved, and which contributes a significant proportion of the company's profits. While the vertically integrated business model provided significant economies of scale and barriers to entry, each business now seeks to be a self-supporting unit without subsidies from other parts of the company.
One of the most important business in which Shell is involved is what?
Answer: natural gas

Question: Various American Idol alumni had success on various record charts around the world; in the U.S. they had achieved 345 number ones on the Billboard charts in its first ten years. According to Fred Bronson, author of books on the Billboard charts, no other entity has ever created as many hit-making artists and best-selling albums and singles. In 2007, American Idol alums accounted for 2.1% of all music sales. Its alumni have a massive impact on radio; in 2007, American Idol had become "a dominant force in radio" according to the president of the research company Mediabase which monitors radio stations Rich Meyer. By 2010, four winners each had more than a million radio spins, with Kelly Clarkson leading the field with over four million spins.
Is there an answer to this question: How many number ones have Idol singers achieved on Billboard charts in just the first ten years?

Answer: 345

Problem: Sumer:

However, some scholars contest the idea of a Proto-Euphratean language or one substrate language. It has been suggested by them and others, that the Sumerian language was originally that of the hunter and fisher peoples, who lived in the marshland and the Eastern Arabia littoral region, and were part of the Arabian bifacial culture. Reliable historical records begin much later; there are none in Sumer of any kind that have been dated before Enmebaragesi (c. 26th century BC). Professor Juris Zarins believes the Sumerians were settled along the coast of Eastern Arabia, today's Persian Gulf region, before it flooded at the end of the Ice Age.

What people lived in river region of Arabia?
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A:
unanswerable