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: Arteries generally carry oxygen-rich blood.

Output: Arteries generally carry oxygen-rich blood.


Input: Consider Input: Fact: when water freezes , that water expands.

Output: freeze.


Input: Consider Input: Fact: an animal needs to attract a mate to reproduce.


Output: animal birth young.