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: Vertebrates are animals that have a backbone.

Ex Output:
backbone muscles move.


Ex Input:
Fact: treating water is used to remove harmful substances before drinking.

Ex Output:
boiling water treat.


Ex Input:
Fact: touch can be used for detecting texture.

Ex Output:

nerve skin touch.