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

Ex Input:
The values of strangeness assigned to various particles are based on decay systematics.

Ex Output:
The values of strangeness assigned to various particles are based on what?


Ex Input:
The height of the wave is used to determine the magnitude of an earthquake.

Ex Output:
What measurement of the wave is used to determine the magnitude of an earthquake?


Ex Input:
The name for a matter that has a fixed volume and a fixed shape is solid.

Ex Output:

What is the name for a matter that has a fixed volume and a fixed shape?