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

Input: Consider Input: All enzymes have an optimal temperature and ph.

Output: All enzymes have an optimal temperature and what?


Input: Consider Input: Bacteria is usually the prey of a protist.

Output: What is usually the prey of a protist?


Input: Consider Input: Chemical digestion mainly occurs in the small intestine.
Output: Where does chemical digestion mainly occur?