Question: who was a film director, Charles Burnett or Herbert Achternbusch?

Context articles: Der Neger Erwin
The Ghost (1982 film)
Wohin?
Namibia: The Struggle for Liberation
Hades (film)
Killer of Sheep
Heart of Glass (film)
Herbert Achternbusch
Austin Film Society
Charles Burnett (director)

Der Neger Erwin is a 1981 West German film directed by and starring Herbert Achternbusch.
 It was entered into the 31st Berlin International Film Festival.
The Ghost (German: "Das Gespenst" ) is a 1982 West German drama film directed by and starring Herbert Achternbusch.
 It was entered into the 33rd Berlin International Film Festival.
Wohin?
 is a 1988 German drama film directed by Herbert Achternbusch.
 It was entered into the 38th Berlin International Film Festival.
Namibia: The Struggle for Liberation is a 2007 epic film on the Namibian independence struggle against South African occupation as seen through the life of Sam Nujoma, the leader of the South West Africa People's Organisation and the first president of the Republic of Namibia.
 The film was written and directed by Charles Burnett, the African American filmmaker, and stars Carl Lumbly and Danny Glover.
 The production was financed by the government of Namibia.
 Music composed by Stephen James Taylor won the award for Best Music Score at the Kuala Lumpur International Film Festival where the film also won for Best African Film and for Best Director.
Hades is a 1995 German drama film directed by and starring Herbert Achternbusch.
 It was entered into the 45th Berlin International Film Festival.
Killer of Sheep is a 1978 American drama film written, directed, produced, and shot by Charles Burnett.
 It features Henry G. Sanders, Kaycee Moore, and Charles Bracy, among others.
 The drama depicts the culture of urban African-Americans in Los Angeles' Watts district.
 The film's style is often likened to Italian neorealism.
Heart of Glass (German: Herz aus Glas ) is a 1976 German film directed and produced by Werner Herzog, set in 18th century Bavaria.
 The film was written by Herzog, based partly on a story by Herbert Achternbusch.
 The main character is "Hias," based on the legendary Bavarian prophet Mühlhiasl.
Herbert Achternbusch (born 23 November 1938 in Munich) is a German writer, painter and filmmaker.
 His anarchist surrealistic films are not known to a wide audience in Germany, although one of them, "Das Gespenst (The Ghost)", caused a scandal in 1983 because of its
The Austin Film Society (AFS) is a non-profit film society based in Austin, Texas.
 Founded in 1985 to exhibit independent, experimental, foreign and various other non-mainstream art films, the film society has grown from just film exhibition to fostering independent filmmaking in Texas and has served as a cornerstone in building the film industry in Austin.
 The film society also owns and maintains Austin Studios, hosts the annual Texas Film Awards gala, and oversees the Austin Film Society grant program.
 The film society was founded by film director Richard Linklater, who currently serves on the board as artistic director.
 Other notable members on the board and advisory board include Tim McCanlies, Robert Rodriguez, Charles Burnett, Guillermo del Toro, Jonathan Demme, Mike Judge, John Sayles, Steven Soderbergh, Paul Stekler and Quentin Tarantino.
Charles Burnett (born April 13, 1944, in Vicksburg, Mississippi) is an African-American film director, film producer, writer, editor, actor, photographer, and cinematographer.
 His most popular films include "Killer of Sheep" (1978), "My Brother's Wedding" (1983), "To Sleep with Anger" (1990), "The Glass Shield" (1994), and "" (2007).
 He has been involved in other types of motion pictures including shorts, documentaries, and a TV series.