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.
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Question: Fact: national parks limit hunting

Answer: Elk are protected where?


Question: Fact: the moon does not contain water

Answer: Which doesn't contain water?


Question: Fact: fossils are formed when layers of sediment cover the remains of organisms over time

Answer:
If enough dirt is able to accumulate over a carcass, then eventually that carcass may?