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: chlorophyll is used for absorbing light energy by plants.
Example Output: chlorophyll all green plants.

Example Input: Fact: a vehicle is used for transportation.
Example Output: boat is a vehicle.

Example Input: Fact: if an organism becomes too hot then that organism may die.
Example Output:
die process.