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

Input: Consider Input: Protist diseases in humans are caused by protozoa.

Output: What type of diseases in humans are caused by protozoa?


Input: Consider Input: Lead sulfate is the white solid that forms on corroded battery terminals.

Output: What is the white solid that forms on corroded battery terminals?


Input: Consider Input: Sound energy travels through matter in wave form.
Output: What type of energy travels through matter in wave form?