Q: Is the question "When was the first flush toilet invented ?" asking about an entity, an abbreviation, a description, a human, a location, or a numeric entity?
A: numeric

Q: Is the question "What is a dental root canal ?" asking about an entity, an abbreviation, a description, a human, a location, or a numeric entity?
A: description

Q: Is the question "What is a fear of shadows ?" asking about an entity, an abbreviation, a description, a human, a location, or a numeric entity?
A: entity

Q: Is the question "What were the first three cities to have a population of more than a million ?" asking about an entity, an abbreviation, a description, a human, a location, or a numeric entity?
A:
location