Generate a topic word for the given sentence. A topic word is usually the name of a person, place, animal, concept or object the sentence is focusing on.

fair use is the idea that it should be okay for a person to reuse something that another person has created, in certain amounts and for certain purposes, without breaking the law.
fair use

aesthetics is a branch of philosophy.
aesthetics

poetry is a type of art form and a type of literature.

poetry

