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

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

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


Input: Consider Input: Glycolysis is a series of reactions that is common to fermentation and cellular respiration.

Output: What series of reactions is common to fermentation and cellular respiration?


Input: Consider Input: Mudslide do you call the sudden flow of mud down a slope because of gravity.


Output: What do you call the sudden flow of mud down a slope because of gravity?