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

Example Input: Plankton is the most common life form in the ocean.
Example Output: What is the most common life form in the ocean?

Example Input: Destructive interference in waves occurs two troughs what things overlap.
Example Output: Destructive interference in waves occurs when what things overlap?

Example Input: Its electon configuration makes nobel gases unreactive.
Example Output:
What makes nobel gases unreactive?