Question: Who was an American film director and film producer who worked primarily at Metro-Goldwyn-Mayer, Gene Nelson or George Sidney ?
Context: "The Gamesters of Triskelion" is a episode of the American science fiction television series "," produced after John Meredyth Lucas had taken over for Gene L. Coon as the program's operating producer at the latter's request, first broadcast January 5, 1968, and repeated May 3, 1968.  Catalogued as episode #45, production #46, it was written by Margaret Armen and directed by Gene Nelson.  Gerald Perry "Jerry" Finnerman was the director of photography for the installment, and his cinematography protege, Al Francis, was chief camera operator. Gene Nelson (March 24, 1920 – September 16, 1996) was an American dancer, actor, screenwriter, and director. Young Bess is a 1953 Technicolor biographical film made by Metro-Goldwyn-Mayer about the early life of Elizabeth I, from her turbulent childhood to the eve of her accession to the throne of England.  The film starred Jean Simmons and Stewart Granger as Thomas Seymour, with Charles Laughton as Elizabeth's father, Henry VIII, a part he had played twenty years before in "The Private Life of Henry VIII".  The film was directed by George Sidney and produced by Sidney Franklin, from a screenplay by and Arthur Wimperis based on the novel by Margaret Irwin (1944). George Sidney (October 4, 1916May 5, 2002) was an American film director and film producer who worked primarily at Metro-Goldwyn-Mayer. Pilot #5 (a.k.a. "Destination Tokyo," "Skyway to Glory", and "The Story of Number Five") is a 1943 black-and-white World War Two propaganda film from Metro-Goldwyn-Mayer, produced by B.P. Fineman, directed by George Sidney, that stars Franchot Tone, Marsha Hunt, Gene Kelly, and Van Johnson.  "Pilot #5" marked Gene Kelly's dramatic film debut. The Latest from Paris is a 1928 American drama silent film directed by Sam Wood and written by Joseph Farnham and A. P. Younger.  The film stars Norma Shearer, George Sidney, Ralph Forbes, Tenen Holtz and William Bakewell.  The film was released on February 4, 1928, by Metro-Goldwyn-Mayer. Ziegfeld Follies is a 1946 American musical comedy film released by Metro-Goldwyn-Mayer and directed by Lemuel Ayers, Roy Del Ruth, Robert Lewis, Vincente Minnelli, Merrill Pye, George Sidney and Charles Walters.  It stars many of MGM leading talents, including Fred Astaire, Lucille Ball, Lucille Bremer, Fanny Brice (the only member of the ensemble who was a star of the original Follies), Judy Garland, Kathryn Grayson, Lena Horne, Gene Kelly, James Melton, Victor Moore, William Powell, Red Skelton, and Esther Williams. Annie Get Your Gun is a 1950 American musical Technicolor comedy film loosely based on the life of sharpshooter Annie Oakley.  The Metro-Goldwyn-Mayer release, with music and lyrics by Irving Berlin and a screenplay by Sidney Sheldon based on the 1946 stage musical of the same name, was directed by George Sidney.  Despite some production and casting problems (Judy Garland was fired from the lead role after a month of filming in which she clashed with the director and repeatedly showed up late or not at all), the film won the Academy Award for best score and received three other nominations.  Star Betty Hutton was recognized with a Golden Globe nomination for Best Actress. Anchors Aweigh is a 1945 American Technicolor musical comedy film directed by George Sidney and starring Frank Sinatra, Kathryn Grayson, and Gene Kelly, in which two sailors go on a four-day shore leave in Hollywood, accompanied by music and song, meet an aspiring young singer and try to help her get an audition at Metro-Goldwyn-Mayer.  In addition to a live-action Kelly dancing with Jerry Mouse the cartoon mouse, the movie also features José Iturbi, Pamela Britton, Dean Stockwell, and Sharon McManus. Kissin' Cousins is a 1964 American musical Panavision Metrocolor comedy film directed by Gene Nelson and starring Elvis Presley.  Written by Gerald Drayson Adams and Gene Nelson, the film is about an Air Force officer who returns to the Great Smoky Mountains assigned to convince his kinfolk to allow the Army to build a missile site on their land.  His mission is complicated when he meets his look-alike cousin and two beautiful country cousins who compete to win his affections.  Presley played two roles in the film: the Air Force officer, with dark hair, and his look-alike cousin, with blond hair.
Answer: George Sidney