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: a telescope is used for observing stars by astronomers.

A: astronomer study.
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Q: Fact: looking at bright objects has a negative impact on the eyes.

A: A bright object is the Sun.
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Q: Fact: water vapor cooling causes that water vapor to condense.

A:
fogged mirror condensation.
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