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: heating salt water causes the water to evaporate while the salt remains.
Output: 


Output:
boiling water evaporate.
evaporate gas.
evaporated salt from water.
evaporation steam.
heat boil.
heating increase.
heating salt water causes the water to evaporate while the salt remains.
salt water evaporate.
water seawater.
water solvent salt solute.