Question: What do Maurice Elvey and Peter Watkins have in common?

full_context: Document 1: Ken Loach: Kenneth Charles Loach (born 17 June 1936) is an English director of television and independent film. He is known for his socially critical directing style and for his socialist ideals, which are evident in his film treatment of social issues such as poverty ("Poor Cow", 1967), homelessness ("Cathy Come Home", 1966) and labour rights ("Riff-Raff", 1991, and "The Navigators", 2001).
Document 2: George Melford: George H. Melford (February 19, 1877 – April 25, 1961) was an American stage and film actor, director, producer, and screenwriter. Often taken for granted as a director today, the stalwart Melford's name by the 1920s was, like Cecil B. DeMille's, appearing in big bold letters above the title of his films.
Document 3: La Commune (Paris, 1871): La Commune (Paris, 1871) is a 2000 historical drama film directed by Peter Watkins about the Paris Commune. A historical re-enactment in the style of a documentary, the film received much acclaim from critics for its political themes and Watkins' direction.
Document 4: Michael Curtiz: Michael Curtiz ( ; born Manó Kaminer, December 24, 1888 April 10, 1962) was a Hungarian-born American film director, recognized as one of the most prolific directors in history. He directed classic films from the silent era and numerous others during Hollywood's Golden Age, when the studio system was prevalent.
Document 5: Peter Tscherkassky: Peter Tscherkassky (born October 3, 1958) is an Austrian avant-garde filmmaker who works primarily with found footage. All of his work is done with film and heavily edited in the darkroom, rather than relying on recent advances in digital film.
Document 6: Powell and Pressburger: The British film-making partnership of Michael Powell (1905–1990) and Emeric Pressburger (1902–1988)—together often known as The Archers, the name of their production company—made a series of influential films in the 1940s and 1950s. —24 films between 1939 and 1972—were mainly derived from original stories by Pressburger with the script written by both Pressburger & Powell. Powell did most of the directing while Pressburger did most of the work of the producer and also assisted with the editing, especially the way the music was used. Unusually, the pair shared a writer-director-producer credit for most of their films. The best known of these are "The Life and Death of Colonel Blimp" (1943), "A Canterbury Tale" (1944), "A Matter of Life and Death" (1946), "Black Narcissus" (1947), "The Red Shoes" (1948), and "The Tales of Hoffmann" (1951).
Document 7: John Ford filmography: John Ford (1894–1973) was an American film director whose career spanned from 1913 to 1971. During this time he directed more than 140 films. Born in Maine, Ford enter the filmmaking industry shortly after graduating from high school with the help of his older brother, Francis Ford, who had established himself as a leading man and director for Universal Studios. After working as an actor, assistant director, stuntman, and prop man – often for his brother – Universal gave Ford the opportunity to direct in 1917. Initially working in short films, he quickly moved into features, largely with Harry Carey as his star. In 1920 Ford left Universal and began working for the Fox Film Corporation. During the next ten years he directed more than 30 films, including the westerns "The Iron Horse" (1924) and "3 Bad Men" (1926), both starring George O'Brien, the war drama "Four Sons" and the Irish romantic drama "Hangman's House" (both 1928 and both starring Victor McLaglen). In the same year of these last two films, Ford directed his first all-talking film, the short "Napoleon's Barber". The following year he directed his first all-talking feature, "The Black Watch".
Document 8: Maurice Elvey: Maurice Elvey (11 November 1887 – 28 August 1967) was the most prolific film director in British history. He directed nearly 200 films between 1913 and 1957. During the silent film era he directed as many as twenty films per year. He also produced more than fifty films - his own as well as films directed by others.
Document 9: Martin Duckworth: Martin Duckworth (born March 8, 1933) is a Canadian documentary director and cinematographer who was on staff at the National Film Board from 1963 to 1970 and has continued to work with them as a freelance filmmaker. He was cinematographer on more than 100 films, and directed or co-directed 30, most of them with the NFB. His credits as director include "12,000 Men" and "Return to Dresden" (Golden Sheaf awards at Yorkton, 1978 and 1986), "Wives’ Tale" (Quebec Critics’ Choice 1980), "No More Hiroshima" (Genie 1984), "Our Last Days in Moscow" (best direction FIFA1987), "Oliver Jones in Africa" (Mannheim Ducate 1990), and "Brush with Life" (Hot Docs Best Film 1994). His cinematography work has included "Christopher’s Movie Matinee", directed by Mort Ransen (1968), "Sad Song of Yellow Skin", by Michael Rubbo (1970), "Le bonhomme", by Pierre Maheu (1972), "La richesse des autres", by Maurice Bulbulian (1973), "Falasha" by Peter Raymont (1983), "La bombe en bonus", by Audrey Schirmer (1986), "Between Two Worlds" by Barry Greenwald (1990), "Seeing Red" by Julia Reichert (1993), "Maureen Forrester, the Diva in Winter", by Donald Winkler (1999), "Return to Kandahar" by Paul Jay (2003), "Professor Norman Cornett", by Alanis Obomsawin (2009), "Ma vie réelle", by Magnus Isacsson (2012), "Granny Power", by Jocelyn Clarke (2016). He has also worked as a cinematographer with such filmmakers as Gilles Groulx, Don Shebib, Laszlo Barna and Peter Watkins
Document 10: Edward Laemmle: Edward Laemmle (October 25, 1887 – April 2, 1937) was an American film director of the silent era. He directed 62 films between 1920 and 1935.
Document 11: Peter Bogdanovich: Peter Bogdanovich (Serbian: Петар Богдановић, "Petar Bogdanović", born July 30, 1939) is an American director, writer, actor, producer, critic and film historian. He is part of the wave of "New Hollywood" directors, which included William Friedkin, Brian De Palma, George Lucas, Martin Scorsese, Michael Cimino and Francis Ford Coppola. His most critically acclaimed and well-known film is the drama "The Last Picture Show" (1971).
Document 12: Michael Caine: Sir Michael Caine {'1': ", '2': ", '3': ", '4': "} ( ; born Maurice Joseph Micklewhite Jr., 14 March 1933) is an English actor, producer, and author. Renowned for his distinctive working class cockney accent, Caine has appeared in over 115 films and is regarded as a British film icon.
Document 13: Peter Watkins: Peter Watkins (born 29 October 1935) is an English film and television director. He was born in Norbiton, Surrey, lived in Sweden, Canada and Lithuania for many years, and now lives in France. He is one of the pioneers of docudrama. His films present pacifist and radical ideas in a nontraditional style. He mainly concentrates his works and ideas around the mass media and our relation/participation to a movie or television documentary.
Document 14: Mervyn LeRoy: Mervyn LeRoy (October 15, 1900 – September 13, 1987) was an American film director, film producer and occasional actor.
Document 15: Peter Duffell: Peter Duffell (born 1937) is a British film and television director and screenwriter, born in Canterbury, England.
ground_truth: director