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: a greenhouse is used to protect plants from the cold.

Ex Output:
cold causes plants to die.


Ex Input:
Fact: friction causes the temperature of an object to increase.

Ex Output:
friction movement.


Ex Input:
Fact: Sperm had to swim from male to female reproductive organs for fertilization.

Ex Output:

Reproductive organs are gonads.


