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: tidal energy can be used to produce electricity.
Example Output: electricity current.

Example Input: Fact: if a planet becomes too hot then that planet cannot sustain life.
Example Output: climate change warmer planet.

Example Input: Fact: pollination requires pollinators.
Example Output:
pollination.