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: camouflage is used for protection by prey against predators.
Example Output: camouflage animals.

Example Input: Fact: Fish have a circulatory system with a two-chambered heart.
Example Output: fish aquatic animals.

Example Input: Fact: Bird beaks are generally adapted for the food they eat.
Example Output:
adaptations are inherited.