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.

Example Input: Fact: an animal requires warmth for survival.
Example Output: animal cow.

Example Input: Fact: ultraviolet light causes sunburn.
Example Output: sunburn can cause cancer.

Example Input: Fact: eating something that contains pollutants has a negative impact on an organism 's survival.
Example Output:
organic food pollutants.