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.

[EX Q]: Fact: if fossils of an animal or plant are found in a place then that animal or plant used to live in that place.
[EX A]: fossil dinosaur.

[EX Q]: Fact: Bird eggs have hard, calcium carbonate shells.
[EX A]: Bird eggs have hard, calcium carbonate shells.

[EX Q]: Fact: pushing on the pedals of a bike cause that bike to move.
[EX A]:
bike bicycle.