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: medicine is used for curing people when they are sick.
Example Output: Medicine prescription.

Example Input: Fact: when the body is hot , sweat is produced to cool the body.
Example Output: body heating causes.

Example Input: Fact: microorganisms cause food to spoil.
Example Output:
bacteria microorganisms food.