[Q]: Sentence: CSP systems use lenses or mirrors and tracking systems to focus a large area of sunlight into a small beam. Question: What method does the photovoltaics system use to turn light into electricity?
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[A]: no

[Q]: Sentence: By the 8th century the Roman cardinals constituted a privileged class among the Roman clergy. Question: When were the Roman cardinals perceived as a privleged class among the Roman clergy?
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[A]: yes

[Q]: Sentence: The Quran describes Muhammad as "ummi", which is traditionally interpreted as "illiterate," but the meaning is rather more complex. Question: Because Mohammed was "ummi," what would he not have known about that lent credence to his prophethood?
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[A]:
no