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

Input: Consider Input: Dig a well allows people to access water in an aquifer that does not flow from a spring or a geyser.

Output: How can people access water in an aquifer that does not flow from a spring or a geyser?

Input: Consider Input: Matter that mechanical wave energy can only travel through is medium.

Output: What is the name of matter that mechanical wave energy can only travel through?

Input: Consider Input: Sexually do invertebrates reproduce.
Output: How do invertebrates reproduce?