Problem: What type of thing is the question "Where are the busiest ports in the world ?" asking about?
Answer: location

Problem: What type of thing is the question "Who was the mother of the man who would not be king , the duke of Windsor ?" asking about?
Answer: human

Problem: What type of thing is the question "What soft drink held a national flavor poll in 1967 ?" asking about?
Answer:
entity