Definition: 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.

Positive Example 1 -
Input: Fact: pesticides cause pollution.
Output: pollution harms.

Positive Example 2 -
Input: Fact: pesticides cause pollution.
Output: modern farming pesticide.

Negative Example 1 -
Input: Fact: pesticides cause pollution.
Output: computer harms.

Negative Example 2 -
Input: Fact: pesticides cause pollution.
Output: toopaste helps.

Now complete the following example -
Input: Fact: the vanes rotating in an electric fan causes air to move.
Output: 


Output:
Electric fan.
air is a gas.
air moving causes.
air oxygen.
air wind.
computer case fan.
electric fan.
fan vanes.
moving air can help people feel cool.
moving air cools skin.
rotate spin.
the vanes rotating in an electric fan causes air to move.
vanes fan electric.
vanes rotating.