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

Input: Consider Input: Chemical digestion mainly occurs in the small intestine.

Output: Where does chemical digestion mainly occur?


Input: Consider Input: Rod is the general shape of centrioles.

Output: What is the general shape of centrioles?


Input: Consider Input: Ions that contain fewer electrons than protons have a net positive charge and are called cations.
Output: Ions that contain fewer electrons than protons have a net positive charge and are called what?