Question: Detlev Buck and Herschell Gordon Lewis, are American?

full_context: Document 1: The Wizard of Gore: The Wizard of Gore is a 1970 American splatter film written by Allen Kahn, directed by Herschell Gordon Lewis, and starring Ray Sager, Judy Cler, and Wayne Ratay.
Document 2: Blood Feast 2: All U Can Eat: Blood Feast 2: All U Can Eat is a 2002 splatter film directed by Herschell Gordon Lewis. It is a sequel to Lewis's 1963 cult classic original "Blood Feast". Filmed under a working title of "Blood Feast 2: Buffet of Blood" and using the same grindhouse style as its predecessor, the film continues the story began in the original film, where a grandson of Fuad Ramses attempts to restart his grandfather's catering business. The film features a cameo appearance by John Waters, a fan of Lewis' work.
Document 3: Herschell Gordon Lewis: Herschell Gordon Lewis (June 15, 1926 – September 26, 2016) was an American filmmaker, best known for creating the "splatter" subgenre of horror films. He is often called the "Godfather of Gore" (a title also given to Lucio Fulci), though his film career included works in a range of exploitation film genres including juvenile delinquent films, nudie-cuties, two children's films and at least one rural comedy. On Lewis' career, AllMovie wrote: "With his better-known gore films, Herschell Gordon Lewis was a pioneer, going farther than anyone else dared, probing the depths of disgust and discomfort onscreen with more bad taste and imagination than anyone of his era."
Document 4: Norbert Kückelmann: Norbert Kückelmann, (born 1 May 1930 - died 31 August 2017) was a German film director, screenwriter and lawyer. He was born in Munich, During the 1950s he studied law and worked part-time as a film critic. After graduation, he worked as a lawyer in Munich and Mainz. In 1965 he founded together with Alexander Kluge and Hans-Rolf Strobel the Young German Film Committee (German: "Kuratorium Junger Deutscher Film" . Continuing to work as a lawyer he directed his first film "Die Sachverständigen" in 1973. At the 23rd Berlin International Film Festival the film won a Silver Bear. His first film also won the Deutscher Filmpreis - Best Feature Film. At the 34th Berlin International Film Festival, his film "Man Under Suspicion" also won a Silver Bear. Two years later, he was a member of the jury at the 36th Berlin International Film Festival.
Document 5: Detlef Bothe (actor): Detlef Bothe (born 24 July 1965) is a German actor, screenwriter, film director and producer. Since the early 1990s, he has appeared in numerous film and television productions, both German and international. In 2015, he appeared in the "James Bond" film Spectre as a henchman, in a scene where he and Q (Ben Whishaw) are seen riding a cable car in the Austrian Alps.
Document 6: Jörg Buttgereit: Jörg Buttgereit (born 20 December 1963) is a German writer/director known for his controversial films. He was born in Berlin, Germany and has lived there his entire life.
Document 7: A Taste of Blood: A Taste of Blood is a 1967 American horror film, produced and directed by Herschell Gordon Lewis. It stars, among others, Bill Rogers and Elizabeth Wilkinson. The movie was also known as "The Secret of Dr. Alucard". Lewis considered this his masterpiece, which may account for the film's relatively long running time of two hours (most of Lewis's films run no longer than 80 minutes).
Document 8: Daniel Brühl: Daniel César Martín Brühl González (] ; born June 16, 1978) is a German actor. He began his work at a young age in a German soap opera called "Forbidden Love" in 1995. In 2003, his starring role in the German film "Good Bye, Lenin!" received wider recognition and critical acclaim which garnered him the European Film Award for Best Actor and the German Film Award for Best Actor. Brühl has worked in both European and American productions in several different languages.
Document 9: Scum of the Earth!: Scum of the Earth! (also known as Sam Flynn) is a 1963 American exploitation film directed by Herschell Gordon Lewis and produced by David F. Friedman. It is credited as being the first film in the "roughie" genre.
Document 10: List of accolades received by The Lives of Others: "The Lives of Others", a 2006 German thriller, marks the feature film debut of director and screenwriter Florian Henckel von Donnersmarck and stars Ulrich Mühe. It has received numerous awards and nominations.
Document 11: Uncle Buck: Uncle Buck is a 1989 American comedy film directed by John Hughes and starring John Candy and Amy Madigan, with Jean Louisa Kelly, Gaby Hoffmann, Macaulay Culkin, Jay Underwood, and Laurie Metcalf in supporting roles.
Document 12: Detlev Buck: Detlev Buck (born December 1, 1962 in Bad Segeberg) is a German film director, actor, producer and screenwriter.
Document 13: Frank Henenlotter: Frank Henenlotter (born August 29, 1950 in New York City), is an American screenwriter, film director and film historian. He is known primarily for his horror comedies, though he would prefer to be classified as an "exploitation" filmmaker (rather than horror). "I never felt that I made ‘horror films’, he has said. "I always felt that I made exploitation films. Exploitation films have an attitude more than anything – an attitude that you don’t find with mainstream Hollywood productions. They’re a little ruder, a little raunchier, they deal with material people don’t usually touch on, whether it’s sex or drugs or rock and roll."
Document 14: Just for the Hell of It: Just for the Hell of It is a 1968 exploitation film directed by Herschell Gordon Lewis.
Document 15: Dennis Gansel: Dennis Gansel (born 4 October 1973) is a film director, writer and actor from Germany.
ground_truth: no