Question: Who is the sibling of the director of Love and the Devil?

full_context: Document 1: The Love Doctor: The Love Doctor is a 1929 American comedy film directed by Melville W. Brown and written by Guy Bolton, Herman J. Mankiewicz, and J. Walter Ruben based upon a play by Victor Mapes and Winchell Smith. The film stars Richard Dix, June Collyer, Morgan Farley, Miriam Seegar, Winifred Harris, and Lawford Davidson. The film was released on October 5, 1929, by Paramount Pictures.
Document 2: 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 3: When Love Grows Cold: When Love Grows Cold is a lost 1926 American silent drama film directed by Harry O. Hoyt, and starring Clive Brook and Natacha Rambova in her only screen starring performance. Rambova was chiefly famous for being the wife of Rudolph Valentino. The film was originally titled "Do Clothes Make the Woman?" But in view of Valentino's recent divorce from Rambova, the distributor took the opportunity to bill her as 'Mrs Valentino' and changed the title to "When Love Grows Cold". She was mortally offended and never worked in film again.
Document 4: 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 5: The Miracle of Love (film): The Miracle of Love is a 1919 American silent drama film directed by Robert Z. Leonard and written by Adrian Johnson based upon the novel of the same name by Cosmo Hamilton. The film stars Lucy Cotton, Blanche Davenport, Leila Blow, Jackie Saunders, Wyndham Standing, and Ivo Dawson. The film was released on November 23, 1919, by Paramount Pictures. It is not known whether the film currently survives, which suggests that it is a lost film.
Document 6: 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 7: Love and the Devil: Love and the Devil is a 1929 American silent drama film directed by Alexander Korda and starring Milton Sills, María Corda and Ben Bard.
Document 8: Der Herr der Liebe: Der Herr der Liebe (The Master of Love) is a 1919 silent film directed in Germany by Fritz Lang. It was his second film. Carl de Vogt and Gilda Langer starred, as they had in Lang's debut feature, "Halbblut". Lang himself is said to have acted in a supporting role.
Document 9: 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 10: 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 11: 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 12: The Love Commandment: The Love Commandment or Thou Shalt Not Steal (German: Du sollst nicht stehlen) is a 1928 German silent film directed by Victor Janson and starring Werner Fuetterer, Dina Gralla and Lilian Harvey.
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: Love's Whirlpool: Love's Whirlpool is a 1924 silent crime drama film directed by Bruce Mitchell and starring James Kirkwood and Lila Lee.
Document 15: His Ward's Love: His Ward's Love is a 1909 American Short film directed by D. W. Griffith and the film was made by the American Mutoscope and Biograph Company.
ground_truth: Zoltan Korda
sub_queries: Love and the Devil >> director Answer: Alexander Korda
Alexander Korda >> sibling Answer: Zoltan Korda