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

Input: Consider Input: Yeast fermentation causes holes in bread.

Output: What causes holes in bread?


Input: Consider Input: The core of a star collapses during a supernova, forming a neutron star.

Output: The core of a star collapses during what event, forming a neutron star?


Input: Consider Input: Spindle fibers pull linked chromosomes apart in anaphase i.


Output: Spindle fibers pull what apart in anaphase i?