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: Adult echinoderms have radial symmetry.

Output: echinoderm is starfish.


Input: Consider Input: Fact: an animal requires nutrients to grow and heal.

Output: animal nutrients.


Input: Consider Input: Fact: conserving resources has a positive impact on the environment.


Output: conserving resources recy.