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: A collapsing nebula leads to nuclear fusion process.

Answer: A collapsing nebula leads to what process?


Question: Hookworms infest the intestines.

Answer: What part of the body do hookworms infest?


Question: The "head" of the sperm contains the genetic material.

Answer:
What part of the sperm contains the genetic material?