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

Ex Input:
A collapsing nebula leads to nuclear fusion process.

Ex Output:
A collapsing nebula leads to what process?

Ex Input:
Water contains 3 atoms.

Ex Output:
How many atoms does water contain?

Ex Input:
In some ways, a collection of gas molecules represents the simplest form of matter.

Ex Output:
In some ways, a collection of gas molecules represents the simplest form of what?