In this task, you are given a question and a corresponding answer. Your task is to generate a fact statement that is useful in answering the given question.

[Q]: Question: Two cats in different rooms may share information by? Answer: vocalizing.
[A]: sound can be used for communication by animals

[Q]: Question: What weather phenomena can crack your windshield? Answer: ice precipitation.
[A]: precipitation is when hail fall from clouds to the ground

[Q]: Question: Which is a complete circuit? Answer: a refrigerator that is running.
[A]:
a complete electrical circuit is a source of electrical energy