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

Ex Input:
Aerobic exercise helps improve the cardiovascular system, while anaerobic exercise causes muscles to get bigger and stronger.

Ex Output:
Aerobic exercise helps improve the cardiovascular system, while what exercise causes muscles to get bigger and stronger?


Ex Input:
The discovery of ribozymes nullified the idea that all biological catalysts are proteins.

Ex Output:
What nullified the idea that all biological catalysts are proteins?


Ex Input:
Epidermis is the middle layer that hair pass through before exiting at the surface of the skin.

Ex Output:

What is the middle layer that hair pass through before exiting at the surface of the skin?