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

Input: Consider Input: Injuries can be prevented by getting proper rest and recovery.

Output: Injuries can be prevented by getting proper what?


Input: Consider Input: Single-celled organisms and multicellular organisms have this in common: both have a way to get rid of waste materials.

Output: Which characteristic do single-celled organisms and multicellular organisms have in common?


Input: Consider Input: In their pure form, all elements have an oxidation number of zero.


Output: In their pure form, all elements have an oxidation number of what?