instruction:
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:
It takes about one year for earth to orbit the sun.
answer:
Which of these takes about one year to complete?


question:
The number of daylight hours each day would be greatest during the summer near the north pole.
answer:
When and where would the number of daylight hours each day be greatest?