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: exercise has a positive impact on a human 's health.

Output: Exercise is movement.


Input: Consider Input: Fact: Food consists of organic molecules that store energy in their chemical bonds.

Output: beef food.


Input: Consider Input: Fact: cross-pollination increases genetic diversity.


Output: cross-pollination.