Read the following question and then pick a category that describes the question.
Question: What 1956 Grace Metalious novel was on the best-seller list for two years ?
What category is the question in? Choose one from Abbreviation, Entity, Description and abstract concept, Human being, Location, Numeric value. Respond with only the category and no additional text.
Entity
Numeric value, Human being, Entity. (The question asks for a specific novel, author, and time period, so it involves all three categories