Problem: What type of thing is the question "What Metropolis landmark was first introduced in the Superman cartoons of the 1940 's ?" asking about?
Answer: location

Problem: What type of thing is the question "What are the names of all the U.S. Navy aircraft carriers ?" asking about?
Answer: entity

Problem: What type of thing is the question "What U.S. President was the first to breed mules ?" asking about?
Answer:
human