Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
One problem with these assignments is admixture. Many people have a highly varied ancestry. For example, in the United States, colonial and early federal history were periods of numerous interracial relationships, both outside and inside slavery. This has resulted in a majority of people who identify as African American having some European ancestors. Similarly, many people who identify as white have some African ancestors. In a survey in a northeastern U.S. university of college students who identified as "white", about 30% were estimated to have up to 10% African ancestry.
Who do many people who identify as white have for ancestors?
A: African

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In March 2006, a law was introduced to forbid smoking in all enclosed public places in Scotland. Wales followed suit in April 2007, with England introducing the ban in July 2007. Pub landlords had raised concerns prior to the implementation of the law that a smoking ban would have a negative impact on sales. After two years, the impact of the ban was mixed; some pubs suffered declining sales, while others developed their food sales. The Wetherspoon pub chain reported in June 2009 that profits were at the top end of expectations; however, Scottish & Newcastle's takeover by Carlsberg and Heineken was reported in January 2008 as partly the result of its weakness following falling sales due to the ban. Similar bans are applied in Australian pubs with smoking only allowed in designated areas.
What company took over Scottish & Newcastle's pubs?
A: Carlsberg and Heineken

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Mach suggested that thought experiments like the bucket argument are problematic. If we were to imagine a universe that only contains a bucket, on Newton's account, this bucket could be set to spin relative to absolute space, and the water it contained would form the characteristic concave surface. But in the absence of anything else in the universe, it would be difficult to confirm that the bucket was indeed spinning. It seems equally possible that the surface of the water in the bucket would remain flat.
What could not remain flat in absolute space?
A: unanswerable

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As a result of the now near-universal human reliance upon agriculture, the few contemporary hunter-gatherer cultures usually live in areas unsuitable for agricultural use.
Ancient hunter-gatherer cultures lived where?
A:
unanswerable