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.

Fact: a stopwatch is used to measure time.
Measuring time.

Fact: Bladder infections can be treated with antibiotics prescribed by a doctor.
antibiotics are made from.

Fact: increasing heat causes thermal expansion.

fire creates heat.