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 Input:
Fact: Most organisms consume--and are consumed by--more than one species.

Ex Output:
consume eat.


Ex Input:
Fact: a tape measure is used to measure length.

Ex Output:
Length.


Ex Input:
Fact: a barometer is used to measure air pressure.

Ex Output:

air pressure headache.