Given a fact, create a question that can be answered using the fact. Construct the question such that it is unambiguous, has a unique answer and the answer can be given using the fact.

Q: Fact: An example of a fossil is a paw print in rock

A: An example of a fossil is a paw print in what?
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Q: Fact: the moon 's surface contains flat areas

A: the lunar surface contains?
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Q: Fact: an ecosystem contains nonliving things

A:
Where would sponges most likely be found making their home?
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