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: Plasma cells are activated B cells that secrete antibodies.

A: antibodies fight infection.
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Q: Fact: Molecules of tRNA bring amino acids to the ribosome in the correct sequence.

A:
amino acids ribosome.
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