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.

Example Input: Question: What is a winding ridge of sand deposited by a stream of meltwater called? Answer: esker
Example Output: A(n) esker is a winding ridge of sand deposited by a stream of meltwater called.

Example Input: Question: Which unit is used to express the amount of energy in food? Answer: Calorie
Example Output: A calorie is used to express the amount of energy in food.

Example Input: Question: What are the three most common elements in the air we breathe? Answer: nitrogen, oxygen and argon
Example Output:
Nitrogen, oxygen and argon are the three most common elements in the air we breathe.