Question: Which Welsh composer directed The Constant Nymph?

full_context: Document 1: Ivor Gurney: Ivor Bertie Gurney (28 August 1890 – 26 December 1937) was an English poet and composer, particularly of songs.
Document 2: The Constant Nymph (1928 film): The Constant Nymph is a 1928 British silent film drama, directed by Adrian Brunel and starring Ivor Novello and Mabel Poulton. This was the first film adaptation of the 1924 best-selling and controversial novel "The Constant Nymph" by Margaret Kennedy. The theme of adolescent sexuality reportedly discomfited the British film censors, until they were reassured that lead actress Poulton was in fact in her 20s.
Document 3: Olive Gilbert: Olive Sarah Gilbert (22 November 1898 – 19 February 1981) was a British singer and actress, who, in a career spanning seven decades, performed first in opera and then in many of Ivor Novello's musicals in London's West End.
Document 4: Easy Virtue (2008 film): Easy Virtue is a 2008 British romantic comedy film based on Noël Coward's play of the same name. The play was previously made into the silent movie "Easy Virtue" (1928) by Alfred Hitchcock. This adaptation is directed by Stephan Elliott, written by Elliott and Sheridan Jobbins, and stars Jessica Biel, Ben Barnes, Colin Firth and Kristin Scott Thomas. The score contains many Coward and jazz-age songs, some of which are sung or partially sung by the cast.
Document 5: Margaret Kennedy: Margaret Kennedy (23 April 1896 – 31 July 1967) was an English novelist and playwright. Her most successful work, as a novel and as a play, was "The Constant Nymph". She was a productive writer and several of her works were made into films.
Document 6: The Constant Nymph (novel): The Constant Nymph is a 1924 novel by Margaret Kennedy. It tells how a teenage girl falls in love with a family friend, who eventually marries her cousin. The two girls show mutual jealousy over their common love for the man.
Document 7: Noël Coward: Sir Noël Peirce Coward (16 December 189926 March 1973) was an English playwright, composer, director, actor and singer, known for his wit, flamboyance, and what "Time" magazine called "a sense of personal style, a combination of cheek and chic, pose and poise".
Document 8: The Constant Nymph (1933 film): The Constant Nymph is a 1933 British drama film directed by Basil Dean and starring Victoria Hopper, Brian Aherne and Leonora Corbett. It is an adaptation of the novel "The Constant Nymph" by Margaret Kennedy. Dean tried to persuade Novello to reprise his appearance from the 1928 silent version "The Constant Nymph" but was turned down and cast Aherne in the part instead.
Document 9: Ivor Novello: Ivor Novello (15 January 1893 – 6 March 1951), born David Ivor Davies, was a Welsh composer and actor who became one of the most popular British entertainers of the first half of the 20th century.
Document 10: Age of Consent (film): Age of Consent (also known as Norman Lindsay's Age of Consent) is a 1969 Australian film which was the penultimate feature film directed by British director Michael Powell. The romantic comedy-drama stars James Mason (co-producer with Powell), Helen Mirren in her first major film role, and Irish character actor Jack MacGowran and features actress Neva Carr Glyn. The screenplay by Peter Yeldham was adapted from the 1935 semi-autobiographical novel of the same name by Norman Lindsay, who died the year this film was released. Lindsay is also portrayed (in this case, by name) in the 1994 film "Sirens", starring Hugh Grant, Sam Neill, and Elle Macpherson.
Document 11: David (1951 film): David is a short film made in 1951 about the Welsh miner and poet David Rees Griffiths. It was directed by Paul Dickson, who also wrote the script, shot by Ronald Anscombe, produced by James Carr, and distributed by Regent Films. Leading Welsh composer Grace Williams wrote the score for the film. The film is 38 minutes long and was given a U certificate. It was the Welsh contribution to the Festival of Britain film festival.
Document 12: Dowster: Dowster or DJ Dowster, also known as David Thomas, (Born in Newport, South Wales, 1 March 1977), is a record producer, singer-songwriter and disc jockey from Cwmbran in South Wales. David has been involved in the rave scene since 1998 and his love of the music lead him to begin his DJ career in
Document 13: David Owen (harpist): David Owen (January 1712 – August 1741) was a Welsh harpist, best remembered as the composer of the popular song, "Dafydd y Garreg Wen" ("David of the White Rock"), which according to tradition Owen composed as he was dying. Dafydd y Garreg Wen was later adapted and published by harpist Edward Jones.
Document 14: The Constant Nymph (1943 film): The Constant Nymph is a 1943 romantic drama film starring Charles Boyer, Joan Fontaine, Alexis Smith, Brenda Marshall, Charles Coburn, May Whitty, and Peter Lorre. It was adapted by Kathryn Scola from the Margaret Kennedy novel and play by Kennedy and Basil Dean, and directed by Edmund Goulding.
Document 15: Bright young things: The Bright Young Things, or Bright Young People, was a nickname given by the tabloid press to a group of bohemian young aristocrats and socialites in 1920s London. They threw elaborate fancy dress parties, went on elaborate treasure hunts through nighttime London, drank heavily and used drugs—all of which was enthusiastically covered by journalists such as Tom Driberg. They inspired a number of writers, including Nancy Mitford ("Highland Fling"), Anthony Powell ("A Dance to the Music of Time"), Henry Green ("Party Going") and the poet John Betjeman ("A Subaltern's Love Song"). Evelyn Waugh's 1930 novel "Vile Bodies", adapted as the 2003 film "Bright Young Things", is a satirical look at this scene. Cecil Beaton began his career in photography by documenting this set, of which he was a member.
ground_truth: Ivor Novello