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.

[EX Q]: Fact: All animals are heterotrophs.
[EX A]: All animals are heterotrophs.

[EX Q]: Fact: Viruses often infect bacteria.
[EX A]: bacteria define.

[EX Q]: Fact: completing a circuit causes electricity to flow through that circuit.
[EX A]:
circuit completed.