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: Cynodonts became more mammal-like as they continued to evolve.

Output: Cynodonts.


Input: Consider Input: Fact: Organisms cluster around hydrothermal vents in the ocean floor.

Output: bacteria vents.


Input: Consider Input: Fact: a flashlight converts chemical energy into light energy.


Output: battery chemical energy.