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: if an object is made of a material then that object has the properties of that material.

Ex Output:
Material is a substance.


Ex Input:
Fact: Cancer is a disease in which cells divide out of control.

Ex Output:
Cancer is cause of death.


Ex Input:
Fact: Scientists still know relatively little about Archaea.

Ex Output:

Archaea.


