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: an animal requires nutrients for survival.

Ex Output:
animal nutrients.


Ex Input:
Fact: erosion of soil has a negative impact on the environment.

Ex Output:
environment forest.


Ex Input:
Fact: Gene cloning is the process of isolating and making copies of a gene.

Ex Output:

gene cloning mutation.