[Q]: Sentence: Between 1880 and 1930, the African-American population of Philadelphia increased from 31,699 to 219,559. Question: When did the black population explode?
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[A]: yes

[Q]: Sentence: The Museu de Belles Arts de Valencia houses a large collection of paintings from the 14th to the 18th centuries, including works by Velazquez, El Greco, and Goya, as well as an important series of engravings by Piranesi. Question: When was Valencia's founding?
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[A]: no

[Q]: Sentence: A higher price was paid for beer in the snug and nobody could look in and see the drinkers. Question: What were the windows in the snug made out of?
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[A]:
no