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: Introns are regions that do not code for proteins.

Ex Output:
introns DNA.


Ex Input:
Fact: poison causes harm to living things.

Ex Output:
arsenic poison.


Ex Input:
Fact: the color of leaves on deciduous trees usually changes in the autumn season.

Ex Output:

autumn season weather.