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.

Input: Consider Input: Fact: Insects may live in large colonies and have complex social behaviors.

Output: insect arthropod.


Input: Consider Input: Fact: Migrants typically travel long distances.

Output: long distances travel time.


Input: Consider Input: Fact: a laser is used for producing light.


Output: What  is Light.