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: Pedigrees are useful tools for studying inheritance patterns.

Output: inheritance animals.


Input: Consider Input: Fact: Most invertebrates have a more complex nervous system.

Output: Invertebrates.


Input: Consider Input: Fact: nerves can be used to feel heat and pressure on the skin.


Output: epidermis.