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: When gas particles collide, what kinds of collisions are these considered? Answer: elastic

Ex Output:
When gas particles collide, these collisions are considered elastic.

Ex Input:
Question: Which is a function of the cardiovascular system? Answer: to transport gases throughout the body

Ex Output:
One function of the cardiovascular system is to transport gases throughout the body.

Ex Input:
Question: Which causes the GREATEST change in a grassy field over time? Answer: Amount of yearly rainfall

Ex Output:
Amount of yearly rainfall causes the greatest change in a grassy field over time.