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

Ex Input:
Control rods play an important role in the modulation of the nuclear chain reaction.

Ex Output:
What play an important role in the modulation of the nuclear chain reaction?


Ex Input:
Muscle groups are controlled by the motor cortex .

Ex Output:
Muscle groups are controlled by what mechanism?


Ex Input:
Lymphocytes destroys the filtered pathogens.

Ex Output:

What destroys the filtered pathogens?