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: Cell division is more complex in eukaryotes than prokaryotes.

Output: Cell division is.


Input: Consider Input: Fact: a delta is formed by deposition of sediment at the mouth of a river by water fanning out.

Output: delta greek.


Input: Consider Input: Fact: being distracted while driving can cause people to crash their car.


Output: cellphone distraction.