In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

Ex Input:
Question: Boron only occurs naturally in compounds with what element? Answer: oxygen

Ex Output:
Boron only occurs naturally in compounds with oxygen element.


Ex Input:
Question: The outer surface of the heart changes from positive to negative during what? Answer: depolarization

Ex Output:
The outer surface of the heart changes from positive to negative during depolarization.


Ex Input:
Question: What layer of soil, essential for farming, has the highest proportion of organic material? Answer: topsoil

Ex Output:

Topsoil layer of soil, essential for farming, has the highest proportion of organic material.