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

Ex Input:
Most of the digestion reactions occur in the small intestine.

Ex Output:
Where do most of the digestion reactions occur?

Ex Input:
Plant nutrition is the study of the chemical elements necessary for plant growth.

Ex Output:
What is the study of the chemical elements necessary for plant growth called?

Ex Input:
Kingdom is the broadest category in the linnaean system.

Ex Output:
What is the broadest category in the linnaean system?