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

Input: Consider Input: Yeast fermentation causes holes in bread.

Output: What causes holes in bread?


Input: Consider Input: Optics explains the behavior of visible light and electromagnetic waves.

Output: What type of physics explains the behavior of visible light and electromagnetic waves?


Input: Consider Input: You call a substance that is not an acid or a base neutral.


Output: What do you call a substance that is not an acid or a base?