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

Example Input: The cytoskeleton holds cell organelles in place within the cytoplasm.
Example Output: What part of the cell holds cell organelles in place within the cytoplasm?

Example Input: Prokaryotes group of simple organisms recycles nutrients and has been on earth since long before multicellular life appeared.
Example Output: What group of simple organisms recycles nutrients and has been on earth since long before multicellular life appeared?

Example Input: Closest to the nucleus orbitals do electrons fill first.
Example Output:
Which orbitals do electrons fill first?