Question: Who is the sibling of the director of Yellow Lily?

full_context: Document 1: Yamata: Yamata is a 1919 Hungarian silent drama film directed by Alexander Korda and starring Emil Fenyvessy, Ila Lóth and Gábor Rajnay. The film was made for the state-owned Hungarian film industry during the Hungarian Soviet Republic, and concerns a black slave's revolt against his master. The film's apparent political leftism, along with that of "Ave Caesar!" (1919), led to Korda's arrest once the Soviet Republic collapsed and he fled Hungary in 1919 during the White Terror.
Document 2: A Knight in London: A Knight in London (German: Eine Nacht in London) is a 1928 British-German silent drama film directed by Lupu Pick and starring Lilian Harvey, Ivy Duke and Robin Irvine. It was one of a significant number of co-productions between the two countries in the late 1920s. The film's direction and the cinematography by Karl Freund were widely praised.
Document 3: 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 4: 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 5: 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.
Document 6: 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 7: Tommy Atkins (director): Tommy Atkins was an American director of the silent and early sound film eras. Born on July 18, 1887 in Springfield, Massachusetts, he would make his entrance into the film industry as the assistant director to Ralph Ince on the 1920 silent film, "Out of the Snows". It would be another eight years before he would make another film, again as assistant director, this time for FBO Pictures, on another silent film, "Crooks Can't Win". He'd work as the assistant director on another sixteen films between 1928 and 1934, the most notable of which would be 1933's "Morning Glory", directed by Lowell Sherman and starring Katharine Hepburn and Douglas Fairbanks Jr.. In 1934 he would be given the chance to helm his first picture, "The Silver Streak", which was one of the top money-makers for RKO Pictures that year. He would only direct two more films, the second of which, "Hi, Gaucho!", he would also write the story for.
Document 8: 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 9: 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 10: 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 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: 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 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: 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 15: 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.
ground_truth: Zoltan Korda
sub_queries: Who directed the film Yellow Lily? Answer: Alexander Korda
Alexander Korda >> sibling Answer: Zoltan Korda