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

Input: Consider Input: Bacteria is usually the prey of a protist.

Output: What is usually the prey of a protist?


Input: Consider Input: Carbon 14 isotope of carbon is typically used to date ancient items.

Output: What isotope of carbon is typically used to date ancient items?


Input: Consider Input: Natural selection is the process that allows organisms with better traits to survive and produce.
Output: What is the process that allows organisms with better traits to survive and produce?