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.

Input: Consider Input: Fact: darkness has a negative impact on photosynthesis.

Output: darkness solar eclipse.


Input: Consider Input: Fact: Scientists who find and study fossils are called paleontologists.

Output: fossil dinosaur bones.


Input: Consider Input: Fact: Macroevolution occurs over geologic time above the level of the species.


Output: geologic time.