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

Ex Input:
Compression zones is the opposite of rarefaction zones, where air molecules in waves are loosely packed.

Ex Output:
What is the opposite of rarefaction zones, where air molecules in waves are loosely packed?


Ex Input:
Endoscopes are used to explore the body through various orifices or minor incisions.

Ex Output:
Endoscopes are used to explore the body through various orifices or these?


Ex Input:
Trash can kingdom is the protist kingdom sometimes called as.

Ex Output:

What is the protist kingdom sometimes called as?