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.
--------
Question: Fact: Carbon monoxide is a gas produced by furnaces and other devices that burn fuel.

Answer: Carbon monoxide.


Question: Fact: Birds move their wings using muscles in the chest.

Answer: Birds move their wings using muscles in the chest.


Question: Fact: Urine is the liquid waste product of the body that is excreted by the urinary system.

Answer:
liquid waste.