TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Simple carbohydrates can be classified in terms of chain length.

SOLUTION: Which carbohydrates can be classified in terms of chain length?

PROBLEM: Fractional crystallization is the separation of compounds on the basis of their solubilities in a given solvent.

SOLUTION: What is the separation of compounds on the basis of their solubilities in a given solvent?

PROBLEM: Radiation, chemicals, and infectious agents are types of mutagens.

SOLUTION:
Radiation, chemicals, and infectious agents are types of what?