Problem: BeiDou Navigation Satellite System:

According to China daily. Fifteen years after the satellite system was launched, it is now generating $31.5 billion for major companies such as China Aerospace Science and Industry Corp, AutoNavi Holdings Ltd, and China North Industries Group Corp.

How much revenue for companies is generated by the ABC system?
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A: unanswerable

Problem: As the European population was severely reduced, land became more plentiful for the survivors, and labour consequently more expensive. Attempts by landowners to forcibly reduce wages, such as the English 1351 Statute of Laborers, were doomed to fail. These efforts resulted in nothing more than fostering resentment among the peasantry, leading to rebellions such as the French Jacquerie in 1358 and the English Peasants' Revolt in 1381. The long-term effect was the virtual end of serfdom in Western Europe. In Eastern Europe, on the other hand, landowners were able to exploit the situation to force the peasantry into even more repressive bondage.
What English law was enacted in order to forcibly reduce wages?
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Answer: Statute of Laborers

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
De novo or "orphan" genes, whose sequence shows no similarity to existing genes, are extremely rare. Estimates of the number of de novo genes in the human genome range from 18 to 60. Such genes are typically shorter and simpler in structure than most eukaryotic genes, with few if any introns. Two primary sources of orphan protein-coding genes are gene duplication followed by extremely rapid sequence change, such that the original relationship is undetectable by sequence comparisons, and formation through mutation of "cryptic" transcription start sites that introduce a new open reading frame in a region of the genome that did not previously code for a protein.
What is one primary source of orphan protein-coding genes?
A: gene duplication followed by extremely rapid sequence change

Context and question: In 2004, worldwide sales of audio CDs, CD-ROMs and CD-Rs reached about 30 billion discs. By 2007, 200 billion CDs had been sold worldwide. CDs are increasingly being replaced by other forms of digital storage and distribution, with the result that audio CD sales rates in the U.S. have dropped about 50% from their peak; however, they remain one of the primary distribution methods for the music industry. In 2014, revenues from digital music services matched those from physical format sales for the first time.
How have CD sales changed internationally?
Answer: unanswerable

Question: In the early years of coverage the BBC had exclusive radio coverage with a picture of the pitch marked in the Radio Times with numbered squares to help the listener follow the match on the radio. The first FA Cup Final on Radio was in 1926 between Bolton Wanderers and Manchester City but this was only broadcast in Manchester, the first national final on BBC Radio was between Arsenal and Cardiff in 1927. The first final on BBC Television was in 1937 in a match which featured Sunderland and Preston North End but this was not televised in full. The following season's final between Preston and Huddersfield was covered in full by the BBC. When ITV was formed in 1955 they shared final coverage with the BBC in one of the only club matches shown live on television, during the 1970s and 1980s coverage became more elaborate with BBC and ITV trying to steal viewers from the others by starting coverage earlier and earlier some starting as early as 9 a.m. which was six hours before kick off. Nowadays, this continues with Setanta and ESPN having all-day broadcasts from Wembley, but terrestrial TV coverage usually begins two hours before kick off. The sharing of rights between BBC and ITV continued from 1955 to 1988, when ITV lost coverage to the new Sports Channel which later became Sky Sports.
Is there an answer to this question: When was the last FA Cup Final broadcast on radio?

Answer: unanswerable

A Science Hall was built in 1883 under the direction of Fr. Zahm, but in 1950 it was converted to a student union building and named LaFortune Center, after Joseph LaFortune, an oil executive from Tulsa, Oklahoma. Commonly known as "LaFortune" or "LaFun," it is a 4-story building of 83,000 square feet that provides the Notre Dame community with a meeting place for social, recreational, cultural, and educational activities. LaFortune employs 35 part-time student staff and 29 full-time non-student staff and has an annual budget of $1.2 million. Many businesses, services, and divisions of The Office of Student Affairs are found within. The building also houses restaurants from national restaurant chains.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How large in square feet is the LaFortune Center at Notre Dame?
Ah, so..
83,000 square feet