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

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

PROBLEM: Proteins are long chains of amino acids.

SOLUTION: What are long chains of amino acids?

PROBLEM: About half of solar type of radiation is absorbed in the first 15 meters of water.

SOLUTION:
About half of what type of radiation is absorbed in the first 15 meters of water?