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: sunlight and rain can cause a rainbow.
Output: 


Output:
a rainbow is a.
cold front rain.
rain comes from clouds.
rain in the desert.
rain precipitation.
rain water particulate.
rainbow color.
rainbow colors refracting.
rainbow seven colors.
rainbow sunlight.
rainbow.
rainbows are pretty.
rainbows.
sunlight rainbow.