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

[Q]: To determine the atomic weight of an element, you should add up protons and neutrons.
[A]: How do you determine the atomic weight of an element?


[Q]: Cancer occurs most often in adults over fifty age.
[A]: Cancer occurs most often in adults over what age?


[Q]: Mechanical to sound energy transfer occurs when a student blows a whistle.
[A]:
Which energy transfer occurs when a student blows a whistle?