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: the mantle is a layer of the Earth

Answer: The mantle is?


Question: Fact: water vapor condensing in clouds causes rain

Answer: Water vapor condensing in clouds may cause?


Question: Fact: carnivores only eat animals

Answer:
Which of these animals might eat a steak?