Problem: What type of thing is the question "What is the only vegetable that starts with '' z '' ?" asking about?
Answer: entity

Problem: What type of thing is the question "What Southern California town is named after a character made famous by Edgar Rice Burroughs ?" asking about?
Answer: location

Problem: What type of thing is the question "How can I determine the radius of an ellipse ?" asking about?
Answer:
description