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: Food consists of organic molecules that store energy in their chemical bonds.

Ex Output:
beef food.


Ex Input:
Fact: Monotremes are mammals that reproduce by laying eggs.

Ex Output:
hatch reproduction egg.


Ex Input:
Fact: sedimentary rocks are formed by deposition.

Ex Output:

What is sedimentary rocks.