Problem: Asphalt:

Naturally occurring crude asphalt/bitumen impregnated in sedimentary rock is the prime feed stock for petroleum production from "Oil sands", currently under development in Alberta, Canada. Canada has most of the world's supply of natural asphalt/bitumen, covering 140,000 square kilometres (an area larger than England), giving it the second-largest proven oil reserves in the world. The Athabasca oil sands is the largest asphalt/bitumen deposit in Canada and the only one accessible to surface mining, although recent technological breakthroughs have resulted in deeper deposits becoming producible by in situ methods. Because of oil price increases after 2003, producing bitumen became highly profitable, but as a result of the decline after 2014 it became uneconomic to build new plants again. By 2014, Canadian crude asphalt/bitumen production averaged about 2.3 million barrels (370,000 m3) per day and was projected to rise to 4.4 million barrels (700,000 m3) per day by 2020. The total amount of crude asphalt/bitumen in Alberta which could be extracted is estimated to be about 310 billion barrels (5010^9 m3), which at a rate of 4,400,000 barrels per day (700,000 m3/d) would last about 200 years.

Which country has the third-largest known oil preserves in the world?
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A: unanswerable

Problem: Heartwood is often visually distinct from the living sapwood, and can be distinguished in a cross-section where the boundary will tend to follow the growth rings. For example, it is sometimes much darker. However, other processes such as decay or insect invasion can also discolor wood, even in woody plants that do not form heartwood, which may lead to confusion.
What kind of plants never form heartwood?
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Answer: woody

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Nasser mediated discussions between the pro-Western, pro-Soviet, and neutralist conference factions over the composition of the "Final Communique" addressing colonialism in Africa and Asia and the fostering of global peace amid the Cold War between the West and the Soviet Union. At Bandung Nasser sought a proclamation for the avoidance of international defense alliances, support for the independence of Tunisia, Algeria, and Morocco from French rule, support for the Palestinian right of return, and the implementation of UN resolutions regarding the ArabIsraeli conflict. He succeeded in lobbying the attendees to pass resolutions on each of these issues, notably securing the strong support of China and India.
What document was meant to resolve lingering issues of colonialism?
A: Final Communique

Context and question: 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 school accepted 49% of the 11,324 people who applied in 2013?
Answer: unanswerable

Question: All the electromagnetic motors, and that includes the types mentioned here derive the torque from the vector product of the interacting fields. For calculating the torque it is necessary to know the fields in the air gap . Once these have been established by mathematical analysis using FEA or other tools the torque may be calculated as the integral of all the vectors of force multiplied by the radius of each vector. The current flowing in the winding is producing the fields and for a motor using a magnetic material the field is not linearly proportional to the current. This makes the calculation difficult but a computer can do the many calculations needed.
Is there an answer to this question: What needs to be known to calculate torque?

Answer: fields in the air gap

This change is interesting from a sociolinguistic point of view because it has apparently happened relatively recently, in the 1970s, and was pioneered by older well-educated women from the upper middle classes. The lowering of the diphthongs has long been current in many Dutch dialects, and is comparable to the English Great Vowel Shift, and the diphthongisation of long high vowels in Modern High German, which centuries earlier reached the state now found in Polder Dutch. Stroop theorizes that the lowering of open-mid to open diphthongs is a phonetically "natural" and inevitable development and that Dutch, after having diphthongised the long high vowels like German and English, "should" have lowered the diphthongs like German and English as well.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What linguistic event in English could we parallel with the Dutch lowering of diphthongs?
Ah, so..
English Great Vowel Shift