Given a statement, generate a question such that the answer is contained in that statement.

Ex Input:
The volume of a thing depends on the mass of the object.

Ex Output:
What depends on the volume of a thing?

Ex Input:
HCl changes the hue of litmus paper from blue to red.

Ex Output:
What color does HCl change in litmus paper?

Ex Input:
Gene activity takes place in the nucleus

Ex Output:
Where does gene activity occur?