Documentaries focus on documenting real people, events, and social contexts to allow audiences to form opinions. John Grierson coined the term "documentary" in 1926 to describe films that document actual events or topics. There are five key elements of documentaries: observation, interviews, dramatization, mise-en-scene, and exposition. Different types of documentaries include fully narrated, fly on the wall, mixed, self-reflexive, docudrama, and docusoap styles.