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: Communities consist of populations of different species.

Ex Output:
communities work together.


Ex Input:
Fact: exercise increases a body 's strength.

Ex Output:
body strength keeps healthy.


Ex Input:
Fact: breaking apart rocks can cause debris.

Ex Output:

a hammer can break rock.