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.

[Q]: Fact: HIV infects and destroys helper T cells.
[A]: HIV aids.


[Q]: Fact: Phylogeny is the evolutionary history of a group of related organisms.
[A]: evolutionary history.


[Q]: Fact: predicting weather requires studying weater.
[A]:
meteorologists.