Problem: What type of thing is the question "What Nantucket shipwreck killed more divers exploring it than the 52 people it sank with ?" asking about?
Answer: entity

Problem: What type of thing is the question "How do I find if my relatives were on the Trail of Tears ?" asking about?
Answer: description

Problem: What type of thing is the question "What is the difference between a board of directors and an advisory board ?" asking about?
Answer:
description