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: Ethologists usually study how animals behave in their natural environment.

Output: Ethologists.


Input: Consider Input: Fact: Viruses are not affected by antibiotics.

Output: Viruses smallpox.


Input: Consider Input: Fact: Fingernails prevent injury by forming protective plates over the ends of the fingers.


Output: Fingernail.