Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: In the tropics tradewinds are the prevailing winds called.

Answer: In the tropics what are the prevailing winds called?


Question: Bacteria may divide several times an hour.

Answer: Bacteria may divide several what an hour?


Question: Carbon element is a biochemical compound based on.

Answer:
What element is a biochemical compound based on?