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

Ex Input:
The scientific process of collecting data outside the lab (in the "wild") is known as field work kind of work.

Ex Output:
The scientific process of collecting data outside the lab (in the "wild") is known as what kind of work?


Ex Input:
Light retains its original color under water because frequency remains the same when light is refracted.

Ex Output:
Light retains its original color under water because what remains the same when light is refracted?


Ex Input:
Producing light without heat is called luminescence.

Ex Output:
Producing light without heat is called what?