Problem: Biodiversity:

Rapid environmental changes typically cause mass extinctions. More than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described. The total amount of related DNA base pairs on Earth is estimated at 5.0 x 1037, and weighs 50 billion tonnes. In comparison, the total mass of the biosphere has been estimated to be as much as 4 TtC (trillion tons of carbon).

What can typically cause mass extinctions?
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A: Rapid environmental changes


Problem: It has been said that GE got into computer manufacturing because in the 1950s they were the largest user of computers outside the United States federal government, aside from being the first business in the world to own a computer. Its major appliance manufacturing plant "Appliance Park" was the first non-governmental site to host one. However, in 1970, GE sold its computer division to Honeywell, exiting the computer manufacturing industry, though it retained its timesharing operations for some years afterwards. GE was a major provider of computer timesharing services, through General Electric Information Services (GEIS, now GXS), offering online computing services that included GEnie.
In what year did GE's "Appliance Park" begin hosting computers?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In the American Old West, policing was often of very poor quality.[citation needed] The Army often provided some policing alongside poorly resourced sheriffs and temporarily organized posses.[citation needed] Public organizations were supplemented by private contractors, notably the Pinkerton National Detective Agency, which was hired by individuals, businessmen, local governments and the federal government. At its height, the Pinkerton Agency's numbers exceeded those of the United States Army.[citation needed]
What were the Old West's local police options?
A: poorly resourced sheriffs and temporarily organized posses


Context and question: In 2005, in order to host The 10th National Game of People's Republic of China, there was a new stadium, Nanjing Olympic Sports Center, constructed in Nanjing. Compared to Wutaishan Sports Center, which the major stadium's capacity is 18,500, Nanjing Olympic Sports Center has a more advanced stadium which is big enough to seat 60,000 spectators. Its gymnasium has capacity of 13,000, and natatorium of capacity 3,000.
How many people can Nanjing Olympic Sports Center's natatorium hold?
Answer: 3,000


Question: The territory that now constitutes Tajikistan was previously home to several ancient cultures, including the city of Sarazm of the Neolithic and the Bronze Age, and was later home to kingdoms ruled by people of different faiths and cultures, including the Oxus civilization, Andronovo culture, Buddhism, Nestorian Christianity, Zoroastrianism, and Manichaeism. The area has been ruled by numerous empires and dynasties, including the Achaemenid Empire, Sassanian Empire, Hephthalite Empire, Samanid Empire, Mongol Empire, Timurid dynasty, and the Russian Empire. As a result of the breakup of the Soviet Union, Tajikistan became an independent nation in 1991. A civil war was fought almost immediately after independence, lasting from 1992 to 1997. Since the end of the war, newly established political stability and foreign aid have allowed the country's economy to grow.
Is there an answer to this question: A civil war was fought immediately before what?

Answer: unanswerable


Problem: Mary (mother of Jesus):

After Mary continued in the "blood of her purifying" another 33 days for a total of 40 days, she brought her burnt offering and sin offering to the Temple in Jerusalem,[Luke 2:22] so the priest could make atonement for her sins, being cleansed from her blood.[Leviticus 12:1-8] They also presented Jesus –  "As it is written in the law of the Lord, Every male that openeth the womb shall be called holy to the Lord" (Luke 2:23other verses). After the prophecies of Simeon and the prophetess Anna in Luke 2:25-38 concluded, Joseph and Mary took Jesus and "returned into Galilee, to their own city Nazareth".[Luke 2:39]

Who was presented at the Temple in Jerusalem?
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A:
Jesus