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

Example Input: The outer layer of the sun is made up of plasma.
Example Output: What is the outer layer of the sun made up of?

Example Input: Processing of filtrate in the proximal tubule helps maintain the ph level in body fluid.
Example Output: Processing of filtrate in the proximal tubule helps maintain what level in body fluid?

Example Input: The name of film that polyester fibers form is mylar.
Example Output:
What is the name of film that polyester fibers form?