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

[Q]: Hydrocarbons compounds, which serve as fuels and are used in manufacturing, are called the driving force of western civilization.
[A]: What compounds, which serve as fuels and are used in manufacturing, are called the driving force of western civilization?


[Q]: Most of the gray matter is on the surface of the brain, surrounding white matter.
[A]: Most of the gray matter is on the surface of the brain, surrounding what other type of matter?


[Q]: Clouds form(s) when water vapor condenses in the air around specs of matter.
[A]:
What form when water vapor condenses in the air around specs of matter?