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

Ex Input:
Water seeping into the ground is known as infiltration.

Ex Output:
Water seeping into the ground is known as?

Ex Input:
Do particles collide more in two reactants fluid they are both in fluid forms or solid forms.

Ex Output:
Do particles collide more in two reactants when they are both in fluid forms or solid forms?

Ex Input:
Sex cells are produced in both the male and female reproductive systems in humans.

Ex Output:
What are produced in both the male and female reproductive systems in humans?