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.

Example Input: Fact: Translation reads the genetic code in mRNA and makes a protein.
Example Output: Translation genetic code.

Example Input: Fact: Birds have a large brain relative to the size of their body.
Example Output: bird brain body.

Example Input: Fact: Some pelycosaurs gave rise to a group of animals called therapsids.
Example Output:
pelycosaurs.