Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: Prostate is the most common type of cancer in adult males.

A: What is the most common type of cancer in adult males?
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Q: Instead of heat, organisms use catalysis to speed up reactions.

A: Instead of heat, organisms use what to speed up reactions?
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Q: The nitrogen cycle includes air, soil, and living things.

A:
The nitrogen cycle includes air, soil, and what?
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