Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

[EX Q]: Although they differ vastly in hardness, pencil lead and diamonds both contain carbon.
[EX A]: Although they differ vastly in hardness, pencil lead and diamonds both contain what element?

[EX Q]: Darwin believed in gradualism.
[EX A]: Did darwin believe in punctuated equilibrium or gradualism?

[EX Q]: The height of the wave is used to determine the magnitude of an earthquake.
[EX A]:
What measurement of the wave is used to determine the magnitude of an earthquake?