Question: Were Sidney Morgan and Berthold Viertel of the same nationality?

full_context: Document 1: Arthur Berthelet: Arthur Berthelet (1879–1949) was an American film director who went from directing stage plays (several on Broadway) to directing silent movies.
Document 2: Sidney Lumet: Sidney Arthur Lumet ( ; June 25, 1924 – April 9, 2011) was an American director, producer and screenwriter with over 50 films to his credit. He was nominated for the Academy Award for Best Director for "12 Angry Men" (1957), "Dog Day Afternoon" (1975), "Network" (1976), and "The Verdict" (1982). He did not win an individual Academy Award, but he did receive an Academy Honorary Award and 14 of his films were nominated for various Oscars, such as "Network", which was nominated for ten, winning four.
Document 3: Walter Reisch: Walter Reisch (May 23, 1903 – March 28, 1983) was an Austrian-born director and screenwriter. He also wrote lyrics to several songs featured in his films, one popular title is "Flieger, grüß mir die Sonne". He was married to the dancer and actress Poldi Dur and was the cousin of Georg Kreisler.
Document 4: A Window in Piccadilly: A Window in Piccadilly is a 1928 British silent romance film directed by Sidney Morgan and starring Joan Morgan, John F. Hamilton and James Carew. It was made at Twickenham Studios as an independent production by Sidney Morgan.
Document 5: Billy Wilder: Samuel "Billy" Wilder ( ; ] ; June 22, 1906March 27, 2002) was an Austrian-American filmmaker, screenwriter, producer, artist, and journalist whose career spanned more than five decades. He is regarded as one of the most brilliant and versatile filmmakers of Hollywood's golden age. With "The Apartment", Wilder became the first person to win Academy Awards as producer, director, and screenwriter for the same film.
Document 6: Salka and Berthold Viertel House: The Salka and Berthold Viertel House at 165 North Mabery Road in Santa Monica, California, was the home of the Austrian screenwriter Salka Viertel and her husband Bertold from 1933 to 1944.
Document 7: Sidney Morgan: Sidney Morgan (2 August 1874 – 11 June 1946) was an English film director, screenwriter, producer and actor. He directed 45 films between 1914 and 1937. As an actor, he appeared in the Alfred Hitchcock film "Juno and the Paycock".
Document 8: Scott Sidney: Scott Sidney (1872 – 20 July 1928), born Harry Wilbur Siggins, was an American film director. He directed 117 films between 1913 and 1927.
Document 9: Sydney Pollack: Sydney Irwin Pollack (July 1, 1934 – May 26, 2008) was an American film director, producer and actor. Pollack directed more than 20 films and 10 television shows, acted in over 30 films or shows, and produced over 44 films. His 1985 film "Out of Africa" won him Academy Awards for directing and producing; he was also nominated for Best Director Oscars for "They Shoot Horses, Don't They?" (1969) and "Tootsie" (1982), in the latter of which he also appeared.
Document 10: Sidney Olcott: Sidney Olcott (September 20, 1872 – December 16, 1949) was a Canadian-born film producer, director, actor and screenwriter.
Document 11: Berthold Viertel: Berthold Viertel (28 June 1885 - 24 September 1953) was an Austrian screenwriter and film director notable for his work in Germany, Britain and the United States.
Document 12: The Man from Yesterday: The Man from Yesterday is a 1932 American pre-Code romantic war drama film made by Paramount Pictures, directed by Berthold Viertel, and written by Oliver H. P. Garrett, based on a story by Neil Blackwell and Rowland G. Edwards.
Document 13: Sabotage (1936 film): Sabotage, also released as The Woman Alone, is a 1936 British espionage thriller film directed by Alfred Hitchcock and starring Sylvia Sidney, Oskar Homolka, and John Loder. It is loosely based on Joseph Conrad's novel "The Secret Agent", about a woman who discovers that her husband is an agent terrorist. "Sabotage" should not be confused with Hitchcock's film "Secret Agent", also released in 1936, but based on the stories of W. Somerset Maugham
Document 14: Stefan Zweig: Stefan Zweig ( ; ] ; November 28, 1881 – February 22, 1942) was an Austrian novelist, playwright, journalist and biographer. At the height of his literary career, in the 1920s and 1930s, he was one of the most popular writers in the world.
Document 15: Sidney J. Furie: Sidney J. Furie (born February 28, 1933) is a Canadian film director, screenwriter, and producer best known for his extensive work in both British and American cinema between the 1960s and early 1980s. Like his contemporaries Norman Jewison and Ted Kotcheff, he was one of earliest Canadian directors to achieve mainstream critical and financial success outside their native country at a time when its film industry was virtually nonexistent. He won a BAFTA Film Award and was nominated for a Palme d'Or for his work on the acclaimed spy thriller "The Ipcress File" starring Michael Caine.
ground_truth: no