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: Cytoplasm refers to all of the cellular material inside the plasma membrane.
a membrane is.

Fact: predicting weather requires studying weater.
meteorologists.

Fact: blowing air into a whistle causes air to vibrate inside the whistle.

air vibrate inside.