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

Ex Input:
Municipal type of pollution comes from sewage, storm drains, septic tanks, boats, and runoff from yards.

Ex Output:
What type of pollution comes from sewage, storm drains, septic tanks, boats, and runoff from yards?


Ex Input:
The brain is the most complex organ in the human body.

Ex Output:
What is the most complex organ in the human body?


Ex Input:
In the freshwater flatworms, protonephridia serve chiefly in osmoregulation.

Ex Output:
In the freshwater flatworms, protonephridia serve chiefly in what?