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

Example Input: Eyespots do the cells in the front of a volvox typically develop to help swim towards light.
Example Output: What do the cells in the front of a volvox typically develop to help swim towards light?

Example Input: Carbon atoms have six neutrons as well as six protons.
Example Output: Carbon atoms have six neutrons as well as how many protons?

Example Input: Cigarettes are a major source of carcinogens, a kind of chemical substances linked with cancer.
Example Output:
Cigarettes are a major source of what kind of chemical substances linked with cancer?