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

Ex Input:
Thermosphere is the upper-most atmosphere.

Ex Output:
What is the upper-most atmosphere known as?


Ex Input:
Pheromones enable communication, which is vital for organisms like ants that live in a large community.

Ex Output:
Pheromones enable what, which is vital for organisms like ants that live in a large community?


Ex Input:
Knees and elbows are examples of the joints of the skeletal system.

Ex Output:
Knees and elbows are examples of what part of the skeletal system?