Question: Who was the sibling of the director of Lilies of the Field?

full_context: Document 1: Polly with a Past: Polly with a Past is a 1920 American silent drama film produced and distributed by Metro Pictures and directed by Leander de Cordova. Based on a 1917 Broadway stage play of the same name, the film starred Ina Claire, reprising her stage role as the title Polly. Clifton Webb had an early unbilled screen appearance in this film.
Document 2: Men of Tomorrow: Men of Tomorrow is a 1932 British drama film, directed by Zoltan Korda and Leontine Sagan, produced by Alexander Korda and written by Anthony Gibbs and Arthur Wimperis. It stars Maurice Braddell, Joan Gardner and Emlyn Williams and features Robert Donat's movie debut.
Document 3: María Corda: She began her acting career in the theatres of Budapest in the early days of World War I and soon after the break-up of Austria-Hungary she also began to work in the film industry. Her first role was in "Se ki, se be" in 1919, directed by the Hungarian director, Korda Sandor, who would come to be known as Alexander Korda. She married Sandor, who was then the leading director in Hungary's fledgling film industry, in 1919. He featured her in three films that year "White Rose" ("Fehér rózsa"), "Ave Caesar!" and "Number 111" ("A 111-es") all of which he directed.
Document 4: The Yellow Ticket: The Yellow Ticket is a 1931 pre-Code American drama film based on the 1914 play of the same name by Michael Morton, produced by the Fox Film Corporation and directed by Raoul Walsh. The film stars Elissa Landi, Lionel Barrymore and features Boris Karloff. The film is also noted for its brief glimpse of nudity.
Document 5: Things to Come: Things to Come (also known in promotional material as H. G. Wells' Things to Come) is a 1936 British black-and-white science fiction film from United Artists, produced by Alexander Korda, directed by William Cameron Menzies, and written by H. G. Wells. The film stars Raymond Massey, Ralph Richardson, Cedric Hardwicke, Pearl Argyle, and Margaretta Scott.
Document 6: Men of Chance: Men of Chance is a 1931 American pre-Code drama film directed by George Archainbaud, starring Ricardo Cortez, Mary Astor, and John Halliday.
Document 7: Men of America: Men of America is a 1932 American Pre-Code Western film directed by Ralph Ince and written by Samuel Ornitz and Jack Jungmeyer. The film stars William Boyd, Charles "Chic" Sale, Dorothy Wilson, Ralph Ince and Henry Armetta. The film was released on November 25, 1932, by RKO Pictures.
Document 8: The Daredevil Men: The Daredevil Men is a 1972 British short subject detailing the activities of stunt performers and stunt arrangers featuring Tom Adams.
Document 9: The Greeks Had a Word for Them: The Greeks Had a Word for Them (1932), also known as Three Broadway Girls, is a pre-Code comedy film directed by Lowell Sherman, produced by Samuel Goldwyn, and released by United Artists. It stars Joan Blondell, Madge Evans, and Ina Claire and is based on the play "The Greeks Had a Word for It" by Zoë Akins. The studio originally wanted actress Jean Harlow for the lead after her success in "Public Enemy" (1931), but she was under contract to Howard Hughes, and he refused to loan her out. The movie served as inspiration for films like "Three Blind Mice" (1938), "Moon Over Miami" (1941), and "How to Marry a Millionaire" (1953).
Document 10: The Man from Blankley's: The Man from Blankley's is a lost 1930 American pre-Code comedy film, directed by Alfred E. Green. It starred John Barrymore and Loretta Young. The film was based on the 1903 play by Thomas Anstey Guthrie, writing under the pseudonym "F. Anstey". The film was Barrymore's second feature length all-talking film. A previous silent film version of Anstey's play by Paramount Pictures appeared in 1920 as "The Fourteenth Man" starring Robert Warwick. That version is also lost.
Document 11: Number 111 (1919 film): Number 111 (Hungarian: A 111-es) is a 1919 Hungarian silent thriller film directed by Alexander Korda and starring Gábor Rajnay, María Corda and Gyula Bartos. The film was based on a novel by Jenő Heltai. It was Korda's final Hungarian film before he went into exile in Austria during the White Terror. The film was remade in 1938.
Document 12: Yellow Lily: Yellow Lily is a 1928 American silent drama film directed by Alexander Korda and starring Billie Dove, Clive Brook and Gustav von Seyffertitz. The film closely followed the formula of Korda's first American film "The Stolen Bride".
Document 13: The Dawn of a Tomorrow (1915 film): The Dawn of a Tomorrow is a 1915 American silent film starring Mary Pickford, produced by Adolph Zukor's Famous Players Film Company and directed by James Kirkwood. It is based on a 1909 stage play starring Eleanor Robson Belmont, her last stage role. This film was rereleased by Paramount in 1919 under their "Success-Series" banner and a copy survives in Sweden today. The story was remade in 1924 again as "The Dawn of a Tomorrow" with Jacqueline Logan in the lead.
Document 14: Wolves (1930 film): Wolves is a 1930 British crime film directed by Albert de Courville and starring Charles Laughton, Dorothy Gish and Malcolm Keen. The screenplay concerns a woman who is captured by a gang of criminals operating in the Arctic, only for the leader to later help her escape. It was based on a play by Georges Toudouze. It was produced by Herbert Wilcox's British and Dominions Film Corporation, but filmed at the Blattner Studios whilst sound equipment was being installed at Wilcox's nearby Imperial Studios, and the sound was added after filming was completed. It was Gish's first sound film, and was Laughton's second talkie (but his first sound drama), having completed a film of a musical variety performance earlier the same year. Of 57 minutes original duration, it was released in 1936 in a 37-minute version retitled "Wanted Men".
Document 15: Lilies of the Field (1930 film): Lilies of the Field is a 1930 American Pre-Code drama film directed by Alexander Korda, and starring Corinne Griffith, Ralph Forbes, and John Loder. It was a remake of the silent 1924 film "Lilies of the Field", in which Griffith had played the same role. Both films were based on a 1921 play of the same name by William J. Hurlbut. "Lilies of the Field" was Griffith's first all-dialogue film. The film is "not" related in any way to the 1963 film of the same name, which starred Sidney Poitier.
ground_truth: Zoltan Korda
sub_queries: Lilies of the Field >> director Answer: Alexander Korda
Alexander Korda >> sibling Answer: Zoltan Korda