[Q]: Sentence: As the chimney warms, the air inside is heated causing an updraft that pulls air through the building. Question: What is a solar chimney?
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[A]: no

[Q]: Sentence: In the 1980s green became the color of a number of new European political parties organized around an agenda of environmentalism. Question: Why was green chosen for a number of new European political parties in the 1980s?
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[A]: yes

[Q]: Sentence: In a February 2010 letter, the United States Environmental Protection Agency sharply criticized these plans because of a water shortfall, sewage problems and the impact on coral reefs. Question: Because of the EPA, how many Marines would the United States be able to send to Guam to live?
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[A]:
no