Problem: What type of thing is the question "What do most tourists visit in Reims ?" asking about?
Answer: location

Problem: What type of thing is the question "What wheel did Blaise Pascal invent in a search for perpetual motion ?" asking about?
Answer: entity

Problem: What type of thing is the question "Who should I call to get a tour of the New York Stock Exchange ?" asking about?
Answer:
human