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]: According to the english system measurement, 4 cups much is equal to 2 pints, 1 quart, and ¼ of a gallon.
[EX A]: According to the english system measurement, how much is equal to 2 pints, 1 quart, and ¼ of a gallon?

[EX Q]: Leafy plants are the sporophytes in ferns.
[EX A]:
What are the sporophytes in ferns?