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: When notebook paper is folded to make an airplane, what physical property of the paper changes? Answer: Shape
[EX A]: Shape notebook paper is folded to make an airplane, what physical property of the paper changes.

[EX Q]: Question: Where are protons and neutrons located? Answer: central nucleus
[EX A]: Protons and neutrons are located in the central nucleus.

[EX Q]: Question: In a position-time graph, what does the slope of the line represent? Answer: velocity
[EX A]:
In a position-time graph, the slope of the line represents the velocity.