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.

[EX Q]: Fact: friction is used for stopping a vehicle by brakes.
[EX A]: braking cars can fishtail.

[EX Q]: Fact: detailed observation of celestial objects requires a telescope.
[EX A]: celestial object star.

[EX Q]: Fact: irradiating food can be used to kill existing microorganisms in the food.
[EX A]:
e coli microorganism food.