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: dropping an object into water causes vibrations in the water

Answer: Stepping in a lake causes?


Question: Fact: a radio is used for communication

Answer: Which can be used to pass information from one person to another?


Question: Fact: a light bulb requires electrical energy to produce light

Answer:
What can be produced when electrical energy is provided to a blown piece of glass with a wire inside?