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 plant requires photosynthesis to grow.

Ex Output:
bamboo plant.


Ex Input:
Fact: a human requires sleep to be healthy.

Ex Output:
brainwaves during sleep.


Ex Input:
Fact: Amphibians have a relatively complex circulatory system with a three-chambered heart.

Ex Output:

amphibian frog.