[Q]: Sentence: First, the catalog of infectious agents has grown to the point that virtually all of the significant infectious agents of the human population have been identified. Question: What must an infectious agent do to cause disease?
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[A]: no

[Q]: Sentence: On February 8, 1955, Malenkov was officially demoted to deputy Prime Minister. Question: To what position was Malenkov demoted?
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[A]: yes

[Q]: Sentence: Animals with a diet deficient in zinc require twice as much food in order to attain the same weight gain as animals given sufficient zinc. Question: What is required for animals with zinc deficiency to gain the same weight as animals with sufficient zinc?
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[A]:
yes