Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
--------
Question: Cancer occurs most often in adults over fifty age.

Answer: Cancer occurs most often in adults over what age?

Question: For to synthesize glycogen purpose does liver use the excess carbohydrate.

Answer: For what purpose does liver use the excess carbohydrate?

Question: Moving electrons have a form of kinetic energy called electrical energy.

Answer:
Moving electrons have a form of kinetic energy called what?