This is a question with answer options. What kind of thing would the answer to the question "How many emperors were there in the Roman Empire ?" be an entity, an abbreviation, a description, a human, a location, or a numeric value?

pick from the following.
(1). description.
(2). entity.
(3). abbreviation.
(4). human.
(5). numeric.
(6). location.
(5).