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

Input: Consider Input: Moving air masses is the main reason for weather change.

Output: What is the main reason for weather change?


Input: Consider Input: When an atom gains or loses an electron it becames a(n) ion.

Output: When an atom gains or loses an electron it becames an?


Input: Consider Input: Prokaryotic cells' organelles because not membrane-bound.


Output: What are unique about prokaryotic cells' organelles?