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: Skin color is another polygenic trait.

Ex Output:
polygenic loci.


Ex Input:
Fact: Amphibians have sense organs to smell and taste chemicals.

Ex Output:
amphibian type.


Ex Input:
Fact: Vertebrates are all chordates that have a backbone.

Ex Output:

backbone is a spinal.