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

PROBLEM: All cells have the small size in common.

SOLUTION: What do all cells have in common?

PROBLEM: Cytosol does the inside of all cells also contain.

SOLUTION:
What does the inside of all cells also contain?