[Q]: Determine the topic of the question. Question: "what is vitamin a for?" Topic:
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[A]: Vitamin A

[Q]: Determine the topic of the question. Question: "how is schizophrenia diagnosed??" Topic:
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[A]: Schizophrenia

[Q]: Determine the topic of the question. Question: "what is a redshirt freshman football player?" Topic:
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[A]: Redshirt (college sports)

[Q]: Determine the topic of the question. Question: "who pulmonary hypertension?" Topic:
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[A]:
Pulmonary hypertension