[Q]: Sentence: Since LED efficacy is inversely proportional to operating temperature, LED technology is well suited for supermarket freezer lighting. Question: LED efficacy is inversely proportional to what?
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[A]: yes

[Q]: Sentence: Beyonce conducted pre-concert food donation drives during six major stops in conjunction with her pastor at St. John's and America's Second Harvest. Question: Beyonce's first world tour was when?
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[A]: no

[Q]: Sentence: All iPods (except the 3rd-generation iPod Shuffle, the 6th & 7th generation iPod Nano, and iPod Touch) have five buttons and the later generations have the buttons integrated into the click wheel an innovation that gives an uncluttered, minimalist interface. Question: How many buttons do most iPods use?
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[A]:
yes