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: Hagfish are noted for secreting large amounts of thick, slimy mucus.

Output: hagfish ancient.


Input: Consider Input: Fact: burning fossil fuels increases the carbon in the atmosphere.

Output: carbon atmosphere.


Input: Consider Input: Fact: condensation causes clouds to form.


Output: clouds cause rain.