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: Gabbro is a dark dense rock that can be found in what? Answer: oceanic crust
[EX A]: Gabbro is a dark dense rock that can be found in the oceanic crust.

[EX Q]: Question: Knees and elbows are examples of what part of the skeletal system? Answer: joints
[EX A]: Knees and elbows are examples of the joints of the skeletal system.

[EX Q]: Question: How thick is the earth's continental crust, on average? Answer: 35 kilometers
[EX A]:
The earth's continental crust, on average, is 35 kilometers thick.