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: Carried through body happens if cancer cells enter the blood stream.

Answer: What happens if cancer cells enter the blood stream?


Question: In invertebrates group of animals several forms of asexual reproduction are found.

Answer: In what group of animals several forms of asexual reproduction are found?


Question: Archaeans produce methane gas as a waste product.

Answer:
Archaeans produce what kind of gas as a waste product?