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: Competition may lead to aggressive behaviors or displays of aggression.

Ex Output:
aggression is caused by adrenaline.


Ex Input:
Fact: Urine leaves the body through a sphincter in the process of urination.

Ex Output:
liquid waste urine.


Ex Input:
Fact: Flowers produce spores that develop into gametophytes.

Ex Output:

Flowers.