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

Q: Force times distance is the equation for work.

A: Force times distance is the equation for what?
****
Q: Seismic waves prove the inner core it is solid.

A: What do seismic waves prove about the inner core?
****
Q: We call water that has been used for cleaning, washing, flushing, or manufacturing wastewater.

A:
What do we call water that has been used for cleaning, washing, flushing, or manufacturing?
****