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 Q]: Question: Which is a function of the cardiovascular system? Answer: to transport gases throughout the body
[EX A]: One function of the cardiovascular system is to transport gases throughout the body.

[EX Q]: Question: What is defined as the velocity of the object at a given moment? Answer: instantaneous velocity
[EX A]: Instantaneous velocity is defined as the velocity of the object at a given moment.

[EX Q]: Question: What is hole that is dug or drilled through the ground down to an aquifer? Answer: well
[EX A]:
A(n) well is a hole that is dug or drilled through the ground down to an aquifer.