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 Input:
Fact: Insects spread disease and destroy crops.

Ex Output:
Crops.


Ex Input:
Fact: if gas is heated then that gas will expand.

Ex Output:
expand heat density gas.


Ex Input:
Fact: Plants have specialized reproductive organs.

Ex Output:

Plants have specialized reproductive organs.