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

Input: Consider Input: Natural resource type of resource is limited in supply and cannot be replaced except over millions of years.

Output: What type of resource is limited in supply and cannot be replaced except over millions of years?

Input: Consider Input: The behavior of ideal gases is explained by kinetic molecular theory.

Output: The behavior of ideal gases is explained by what theory of gases?

Input: Consider Input: Approximately 10 times much larger is the radius of an atom than that of its nucleus.
Output: Approximately how much larger is the radius of an atom than that of its nucleus?