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

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

[Q]: Light retains its original color under water because frequency remains the same when light is refracted.
[A]: Light retains its original color under water because what remains the same when light is refracted?

[Q]: Pollen do bees carry from one plant to another to facilitate plant growth and development.
[A]:
What do bees carry from one plant to another to facilitate plant growth and development?