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:
Most protein antigens require signals from helper t cells (th2) to proceed to make antibody.

Ex Output:
Most protein antigens require signals from helper t cells (th2) to proceed to make what?

Ex Input:
There are two different main types of diabetes.

Ex Output:
How many different main types of diabetes are there?