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

Input: Consider Input: Gardasil is the vaccine to prevent infection of hpv.

Output: What is the vaccine to prevent infection of hpv?


Input: Consider Input: Eyespots do the cells in the front of a volvox typically develop to help swim towards light.

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


Input: Consider Input: Nitrogen has 5 valence electrons.


Output: How many valence electrons does nitrogen have?