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

[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?

[EX Q]: Dig a well allows people to access water in an aquifer that does not flow from a spring or a geyser.
[EX A]: How can people access water in an aquifer that does not flow from a spring or a geyser?

[EX Q]: Felsic igneous rocks contain felsic minerals, typically contain aluminum and sodium and are high in silica.
[EX A]:
Which kind of rocks contain felsic minerals, typically contain aluminum and sodium and are high in silica?