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

Ex Input:
If an air mass forms over an ocean it is called a maritime air mass.

Ex Output:
If an air mass forms over an ocean it is called what type of air mass?

Ex Input:
Seismologists originally measured the intensity of an earthquake with the mercalli scale.

Ex Output:
How did seismologists originally measure the intensity of an earthquake?

Ex Input:
Inflammatory response is the second line of defense.

Ex Output:
What is the second line of defense?