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: Birds evolved from a group of bipedal dinosaurs called theropods.
Example Output: Birds evolved.

Example Input: Fact: recycling has a positive impact on the environment.
Example Output: Recycling is converting.

Example Input: Fact: healing requires rest.
Example Output:
healing cells.