Detailed Instructions: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
See one example below:
Problem: Earth rotates on its axis once times in one day.
Solution: How many times does Earth rotate on its axis in one day?
Explanation: The given output correctly poses a question based on the scientific fact given.

Problem: Most of the gray matter is on the surface of the brain, surrounding white matter.
Solution:
Most of the gray matter is on the surface of the brain, surrounding what other type of matter?