Here is a single or multi-choice question: What was the name given the 6 , 500 German airforce troops that used the Spanish Civil War as a training exercise ?

Would the answer to this question be an entity, an abbreviation, a description, a human, a location, or a numeric value?

pick from the following. (1). description (2). entity (3). abbreviation (4). human (5). numeric (6). location
(4).