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: glass cause refraction of light.

Ex Output:
glass mirror.


Ex Input:
Fact: Many seeds can wait to germinate until conditions are favorable for growth.

Ex Output:
germinate conditions.


Ex Input:
Fact: Vertebrate chordates have a backbone.

Ex Output:

Vertebrate chordates bear.