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: weathering means breaking down rocks from larger whole into smaller pieces by weather.
Output: 


Output:
freeze thaw weathering.
larger bigger.
rain is weather.
rocks boulders.
rocks weathering.
rocks.
smaller pieces weather minerals.
weather type rain.
weathering erosion breaking down.
weathering is eroding.
weathering rain rock.
weathering water.