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: Climate is the average weather in an area over a long period of time.

Output: area is a place.


Input: Consider Input: Fact: Sex hormones are chemical messengers that control sexual development and reproduction.

Output: chemical messengers carry signals.


Input: Consider Input: Fact: Birds evolved from a group of bipedal dinosaurs called theropods.


Output: Birds evolved.