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: a living thing requires nutrients to grow

Answer: organic life requires certain things to grow such as?

Question: Fact: telephones convert sound energy into electrical energy

Answer: Magnets in ear pieces convert sound waves into?

Question: Fact: lightning can cause a forest fire

Answer:
In a forest without anyone around, a fire may be started by?