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

[Q]: Water seeping into the ground is known as infiltration.
[A]: Water seeping into the ground is known as?


[Q]: The human eye detect can detect three colors of light.
[A]: How many colors of light can the human eye detect?


[Q]: Acids release hydrogen ions, by definition.
[A]:
What type of particles do acids release, by definition?