A documentary is a factual film or television program that uses real footage and interviews to report on a particular subject. The purpose is to document real events with evidence. John Grierson coined the term "documentary" and produced some of the earliest examples in the 1930s and 1940s like Night Mail and Drifters, which captured real postal workers and fishermen without acknowledgment from the subjects. Documentaries can take various forms including docusoaps that follow people over time, docudramas that recreate real events, or mixed formats that combine interviews and archival footage with narration.