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: Any surface that has not been sterilized is likely to be covered with bacteria.

A: bacteria can make people sick.
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Q: Fact: Caffeine is an example of a psychoactive drug.

A: caffeine psychoactive.
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Q: Fact: bacteria in soil convert atmospheric nitrogen into a form usable by plants.

A:
bacteria  atmospheric nitrogen.
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