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: nerves can be used to feel heat and pressure on the skin.

Ex Output:
epidermis.


Ex Input:
Fact: refracting sunlight causes sunlight to split into different colors.

Ex Output:
prism refraction.


Ex Input:
Fact: if weather is stormy then there is a greater chance of rain.

Ex Output:

hurricanes stormy.