Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Evidence suggests big-game hunter gatherers crossed the Bering Strait from Asia (Eurasia) into North America over a land bridge (Beringia), that existed between 47,00014,000 years ago. Around 18,500-15,500 years ago, these hunter-gatherers are believed to have followed herds of now-extinct Pleistocene megafauna along ice-free corridors that stretched between the Laurentide and Cordilleran ice sheets. Another route proposed is that, either on foot or using primitive boats, they migrated down the Pacific coast to South America.
These ancient hunter-gathers followed what path in pursuit of game?
A: ice-free corridors

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In March 2013, Governor Rick Snyder declared a financial emergency in the city, stating that the city has a $327 million budget deficit and faces more than $14 billion in long-term debt. It has been making ends meet on a month-to-month basis with the help of bond money held in a state escrow account and has instituted mandatory unpaid days off for many city workers. Those troubles, along with underfunded city services, such as police and fire departments, and ineffective turnaround plans from Bing and the City Council led the state of Michigan to appoint an emergency manager for Detroit on March 14, 2013. On June 14, 2013 Detroit defaulted on $2.5 billion of debt by withholding $39.7 million in interest payments, while Emergency Manager Kevyn Orr met with bondholders and other creditors in an attempt to restructure the city's $18.5 billion debt and avoid bankruptcy. On July 18, 2013, the City of Detroit filed for Chapter 9 bankruptcy protection. It was declared bankrupt by U.S. judge Stephen Rhodes on December 3, with its $18.5 billion debt he said in accepting the city's contention that it is broke and that negotiations with its thousands of creditors were infeasible.
How much did Detroit owe when it was declared bankrupt?
A: $18.5 billion

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Green is common in nature, as many plants are green because of a complex chemical known as chlorophyll, which is involved in photosynthesis. Chlorophyll absorbs the long wavelengths of light (red) and short wavelengths of light (blue) much more efficiently than the wavelengths that appear green to the human eye, so light reflected by plants is enriched in green. Chlorophyll absorbs green light poorly because it first arose in organisms living in oceans where purple halobacteria were already exploiting photosynthesis. Their purple color arose because they extracted energy in the green portion of the spectrum using bacteriorhodopsin. The new organisms that then later came to dominate the extraction of light were selected to exploit those portions of the spectrum not used by the halobacteria.
What type of wavelength does purple have?
A: unanswerable

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Arsenal appointed Herbert Chapman as manager in 1925. Having already won the league twice with Huddersfield Town in 192324 and 192425 (see Seasons in English football), Chapman brought Arsenal their first period of major success. His revolutionary tactics and training, along with the signings of star players such as Alex James and Cliff Bastin, laid the foundations of the club's domination of English football in the 1930s. Under his guidance Arsenal won their first major trophies victory in the 1930 FA Cup Final preceded two League Championships, in 193031 and 193233. In addition, Chapman was behind the 1932 renaming of the local London Underground station from "Gillespie Road" to "Arsenal", making it the only Tube station to be named specifically after a football club.
What was Herbert Chapman's last year as Arsenal's coach?
A:
unanswerable