question: Who is the spouse of the director of film The Belles Of St. Trinian'S?
context: [["Gertrude of Bavaria", ["Gertrude of Saxony and Bavaria( 1152/55\u20131197) was Duchess of Swabia as the spouse of Duke Frederick IV, and Queen of Denmark as the spouse of King Canute VI."]], ["Frank Launder", ["Frank Launder (28 January 1906 \u2013 23 February 1997) was a British writer, film director and producer, who made more than 40 films, many of them in collaboration with Sidney Gilliat.", "He was born in Hitchin, Hertfordshire, England and worked briefly as a clerk before becoming an actor and then a playwright.", "He began working as a screenwriter on British films in the 1930s, contributing the original story for the classic Will Hay comedy \"", "Oh, Mr Porter!\"", "(1937).", "After writing a number of screenplays with Gilliat, including \"The Lady Vanishes\" (1938) for Alfred Hitchcock, and \"Night Train to Munich\" for Carol Reed; the two men wrote and directed the wartime drama \"Millions Like Us\" (1943).", "After founding their own production company Individual Pictures, they produced a number of memorable dramas and thrillers including", "\"I See a Dark Stranger\" (1945) and \"Green for Danger\" (1946), but were best known for their comedies including \"The Happiest Days of Your Life\" (1950) and most famously, the St Trinians series, based on Ronald Searle's cartoons set in an anarchic girls school.", "He was married to actress Bernadette O'Farrell from 1950 until his death in Monaco.", "The couple had two children."]], ["The Belles of St. Trinian's", ["The Belles of St Trinian's is a British comedy film set in the fictional St Trinian's school, released in 1954.", "It and its sequels were inspired by British cartoonist Ronald Searle.", "Directed by Frank Launder and written by Launder and Sidney Gilliat, it was the first of a series of four films.", "Alastair Sim stars in a dual role as the headmistress Miss Millicent Fritton and her twin brother Clarence Fritton."]], ["The Pure Hell of St Trinian's", ["The Pure Hell of St Trinian's is a 1960 British comedy film set in the fictional St Trinian's School.", "Directed by Frank Launder and written by him and Sidney Gilliat, it was the third in a series of four films."]], ["Martin Walker (actor)", ["Martin Walker( 27 July 1901 \u2013 18 September 1955) was a British stage and screen actor.", "Walker appeared in films for over thirty years from 1922 onwards, largely in supporting roles but occasionally as a lead such as in\" Help Yourself\"( 1932).", "He also wrote and directed a short film\" Hide and Seek\" in 1922.", "Walker's final film appearance was\" The Belles of St. Trinian's\" in 1954."]], ["Sophia Magdalena of Denmark", ["Sophia Magdalena of Denmark (3 July 1746 \u2013 21 August 1813) was Queen of Sweden as the spouse of King Gustav III."]], ["Maria Teresa, Grand Duchess of Luxembourg", ["Maria Teresa, Grand Duchess of Luxembourg( born Mar\u00eda Teresa Mestre y Batista; on 22 March 1956), is the spouse of Grand Duke Henri."]], ["The Belles of St. Clements", ["The Belles of St. Clements is a 1936 British drama film directed by Ivar Campbell and starring Evelyn Foster, Meriel Forbes and Basil Langton.", "It is a melodrama set inside a teacher training college."]], ["St Trinian's (film)", ["St Trinian's is a 2007 British comedy film and the sixth in a long- running series of British films based on the works of cartoonist Ronald Searle set in St Trinian's School.", "The first five films form a series, starting with\" The Belles of St Trinian's\" in 1954, with sequels in 1957, 1960, 1966 and 1980.", "The release of 2007, 27 years after the last entry, and 53 years after the first film, is a rebooting of the franchise, rather than a direct sequel, with certain plot elements borrowed from the first film.", "Whereas the earlier films concentrated on the adults, this film gives the school pupils greater prominence.", "St Trinian's is an anarchic school for uncontrollable girls run by eccentric headmistress Camilla Dagey Fritton( the reboot continues the tradition, established by Alastair Sim in the original film, of casting a male actor to play the female headmistress, with Rupert Everett inheriting the role).", "\" St Trinian's\" received mixed reviews but remains one of the highest- grossing British independent films of the last thirty years."]], ["Beryl Reid", ["Beryl Elizabeth Reid,( 17 June 1919 \u2013 13 October 1996), was a British actress of stage and screen.", "She won the 1967 Tony Award for Best Actress in a Play for\" The Killing of Sister George\", the 1980 Olivier Award for Best Comedy Performance for\" Born in the Gardens\", and the 1982 BAFTA TV Award for Best Actress for\" Smiley's People\".", "Her film appearances included\" The Belles of St. Trinian's\"( 1954),\" The Killing of Sister George\"( 1968),\" The Assassination Bureau\"( 1969), and\" No Sex Please, We're British\"( 1973)."]]]
supporting_facts: [["The Belles of St. Trinian's", 2], ["Frank Launder", 8]]
evidences: [["The Belles of St Trinian's", "director", "Frank Launder"], ["Frank Launder", "spouse", "Bernadette O'Farrell"]]
answer: Bernadette O'Farrell