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

Input: Consider Input: Seismic waves prove the inner core it is solid.

Output: What do seismic waves prove about the inner core?


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

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


Input: Consider Input: Gas has no definite volume and no definite shape.
Output: Which state of matter has no definite volume and no definite shape?