Problem: What type of thing is the question "What 's the second-most-used murder weapon in the U.S. ?" asking about?
Answer: entity

Problem: What type of thing is the question "What ocean did the Titanic sink in ?" asking about?
Answer: location

Problem: What type of thing is the question "What university football team did O.J. Simpson take to the Rose Bowl ?" asking about?
Answer:
human