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: a flower 's purpose is to produce seeds.
[EX A]: animals seeds.

[EX Q]: Fact: Kidney failure may be treated with dialysis.
[EX A]: Kidney failure.

[EX Q]: Fact: an acid changes the color of litmus paper from blue to red.
[EX A]:
acid changes color.