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: ethanol sometimes is made of corn

Answer: Ethanol sometimes might be?


Question: Fact: non-contact forces can affect objects that are not touching

Answer:
You can scuff your socked feet on a shag carpet and shock a friend because of?