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: Introns are regions that do not code for proteins.

A: introns DNA.
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Q: Fact: TRH stimulates the pituitary gland to produce thyroid-stimulating hormone, or TSH.

A: TRH.
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Q: Fact: Neurons are the structural and functional units of the nervous system.

A:
nervous system function.
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