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: cables are used for support by suspension bridges.

A: cables are metal.
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Q: Fact: recycling has a positive impact on the environment.

A: Recycling is converting.
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Q: Fact: a greenhouse is used to protect plants from the cold.

A:
cold causes plants to die.
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