In this task, you need to write a topic word from the given fact. The topic word must have at least one word overlap with the given fact. The topic word often involves adding a new word from a related concept. In your topic word, use at least one word from the given fact. Topic words with two or more words work best.

Q: Fact: sinkholes are formed by precipitation.

A: precipitation are formed by.
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Q: Fact: Kidney failure may be treated with dialysis.

A: Kidney failure.
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Q: Fact: Trees have woody stems covered with bark.

A:
bark insulates.
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