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: a calculator is used for adding.
Example Output: adding finance.

Example Input: Fact: Polyps usually reproduce asexually.
Example Output: Coral polyp.

Example Input: Fact: storms cause bodies of water to increase amount of water they contain.
Example Output:
bodies of water lakes.