Write a correct answer to the given question based on its associated fact. Make sure that your answer is contained in the associated fact. Don't be creative and introduce any new word that is not mentioned in the associated fact! Remember that the associated fact has been rearranged to form the question. So, the correct answer words must lie within the associated fact. The correct answer can be a word, phrase, or even a sentence.

Input: Consider Input: Fact: incinerated mercury can cause the ph of soil to decrease. 
Question: what can cause the ph of soil to decrease?

Output: incinerated mercury.


Input: Consider Input: Fact: Pollen grains are small male reproductive bodies of plants used to pollinate female flowers. 
Question: pollen grains are small male reproductive bodies of plants used to pollinate what?

Output: female flowers.


Input: Consider Input: Fact: Light bulbs are used to avoid stumbling around in basements. 
Question: What are used to avoid stumbling around in basements?


Output: light bulbs.