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

Ex Input:
The location of an object in a frame of reference is called position.

Ex Output:
The location of an object in a frame of reference is called what?


Ex Input:
Opaque is the term for matter that does not let any light pass through.

Ex Output:
What is the term for matter that does not let any light pass through?


Ex Input:
Mechanoreceptors statoliths settle to the low point in the chamber, they stimulate what in that location.

Ex Output:

When statoliths settle to the low point in the chamber, they stimulate what in that location?