Problem: Alps:

Radiocarbon dated charcoal placed around 50,000 years ago was found in the Drachloch (Dragon's Hole) cave above the village of Vattis in the canton of St. Gallen, proving that the high peaks were visited by prehistoric people. Seven bear skulls from the cave may have been buried by the same prehistoric people. The peaks, however, were mostly ignored except for a few notable examples, and long left to the exclusive attention of the people of the adjoining valleys. The mountain peaks were seen as terrifying, the abode of dragons and demons, to the point that people blindfolded themselves to cross the Alpine passes. The glaciers remained a mystery and many still believed the highest areas to be inhabited by dragons.

What does the finding of charcoal in Dragon's Hole prove?
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A: the high peaks were visited by prehistoric people

Problem: Three-phase AC railway electrification was used in Italy, Switzerland and the United States in the early twentieth century. Italy was the major user, for lines in the mountainous regions of northern Italy from 1901 until 1976. The first lines were the Burgdorf-Thun line in Switzerland (1899), and the lines of the Ferrovia Alta Valtellina from Colico to Chiavenna and Tirano in Italy, which were electrified in 1901 and 1902. Other lines where the three-phase system were used were the Simplon Tunnel in Switzerland from 1906 to 1930, and the Cascade Tunnel of the Great Northern Railway in the United States from 1909 to 1927.
The first four-way lines were created in what year?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
At dawn on Sunday, 25 June 1950, the Korean People's Army crossed the 38th parallel behind artillery fire. The KPA justified its assault with the claim that ROK troops had attacked first, and that they were aiming to arrest and execute the "bandit traitor Syngman Rhee". Fighting began on the strategic Ongjin peninsula in the west. There were initial South Korean claims that they had captured the city of Haeju, and this sequence of events has led some scholars to argue that the South Koreans actually fired first.
Who claimed to have taken control of Haeju?
A: the South Koreans

Context and question: One rescue team reported only 2,300 survivors from the town of Yingxiu in Wenchuan County, out of a total population of about 9,000. 3,000 to 5,000 people were killed in Beichuan County, Sichuan alone; in the same location, 10,000 people were injured and 80% of the buildings were destroyed. The old county seat of Beichuan was abandoned and preserved as part of the Beichuan Earthquake Museum. Eight schools were toppled in Dujiangyan. A 56-year-old was killed in Dujiangyan during a rescue attempt on the Lingyanshan Ropeway, where due to the earthquake 11 tourists from Taiwan had been trapped inside cable cars since May 13. A 4-year-old boy named Zhu Shaowei (traditional Chinese: ; simplified Chinese: ; pinyin: Zhu Shaowei) was also killed in Mianzhu City when a house collapsed on him and another was reported missing.
What was the previous population of Yingxiu?
Answer: about 9,000

Question: The major applications of copper are in electrical wires (60%), roofing and plumbing (20%) and industrial machinery (15%). Copper is mostly used as a pure metal, but when a higher hardness is required it is combined with other elements to make an alloy (5% of total use) such as brass and bronze. A small part of copper supply is used in production of compounds for nutritional supplements and fungicides in agriculture. Machining of copper is possible, although it is usually necessary to use an alloy for intricate parts to get good machinability characteristics.
Is there an answer to this question: What percentage of copper is used in industrial machinery?

Answer: 15%

QUES: BYU accepted 49 percent of the 11,423 people who applied for admission in the summer term and fall semester of 2013. The average GPA for these admitted students was 3.82. U.S. News and World Report describes BYU's selectivity as being "more selective" and compares it with such universities as the University of Texas at Austin and The Ohio State University. In addition, BYU is ranked 26th in colleges with the most freshman Merit Scholars, with 88 in 2006. BYU has one of the highest percentage of accepted applicants that go on to enroll (78 percent in 2010).

What percentage of accepted BYU students went on to enroll in 2010?
What is the answer?
ANS:
78