Given a statement, generate a question such that the answer is contained in that statement.

[Q]: Octopuses use ink for hiding from sharks.
[A]: What do Octopuses use for hiding from sharks?


[Q]: ice ages buried Earth in permafrost for millions of years at a time
[A]: How many years have ice ages buried Earth in permafrost?


[Q]: Semen pass out of the body through a single tube that runs to the penis.
[A]:
What does semen pass out of the body through?