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

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:
Pleiotropic effects causes symptoms associated with sickle-cell disease.

Ex Output:
What causes symptoms associated with sickle-cell disease?


Ex Input:
Two membranes form the mitochondrion structure of a cell.

Ex Output:

How many membranes form the mitochondrion structure of a cell?