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: What is the key to the demographic transition? Answer: reduced family size

Ex Output:
Reduced family size is the key to the demographic transition.


Ex Input:
Question: All cells undergo what during a lifetime, but when this process is out of control, cancer results? Answer: cell division

Ex Output:
All cells undergo cell division during a lifetime, but when this process is out of control, cancer results.


Ex Input:
Question: The specialized study of the motion of objects that are atomic/subatomic in size is called what? Answer: quantum mechanics

Ex Output:

The specialized study of the motion of objects that are atomic/subatomic in size is called quantum mechanics.