Question: What former call girl and madam had her memoir adapted to a film directed by Nicholas Sgarro?

full_context: Document 1: De zaak Natalee Holloway: De zaak Natalee Holloway: mijn eigen verhaal over haar verdwijning op Aruba (English: "The Case of Natalee Holloway: My own story about her disappearance in Aruba") is an autobiographical non-fiction book written by Joran van der Sloot with Zvezdana Vukojevic. It was released in 2007 in the Dutch language by Amsterdam-based publisher Sijthoff. An English version was not published.
Document 2: The Lady in the Van: The Lady in the Van is a 2015 British comedy-drama film directed by Nicholas Hytner, and starring Maggie Smith and Alex Jennings. It was written by Alan Bennett, and it tells the true story of his interactions with Mary Shepherd, an elderly woman who lived in a dilapidated van on his driveway in London for 15 years. He had previously published the story as a 1989 essay, 1990 book, 1999 stage play, and 2009 radio play on BBC Radio 4. Smith had previously portrayed Shepherd twice: in the 1999 stage play, which earned her a Best Actress nomination at the 2000 Olivier Awards and in the 2009 radio adaptation.
Document 3: Sex and the Single Girl: Sex and the Single Girl is a 1962 non-fiction book by American writer Helen Gurley Brown, written as an advice book that encouraged women to become financially independent and experience sexual relationships before or without marriage. The book sold two million copies in three weeks, was sold in 35 countries and has made the "Los Angeles Times", "The New York Times" and "Time" bestseller lists.
Document 4: The Naked Civil Servant (film): The Naked Civil Servant is a 1975 biographical film based on Quentin Crisp's 1968 book of the same name, starring John Hurt and directed by Jack Gold, adapted by Philip Mackie, and produced by Verity Lambert.
Document 5: 9½ Weeks: 9½ Weeks (originally titled Nine ½ Weeks) is a 1986 American erotic romantic drama film directed by Adrian Lyne with a screenplay by Sarah Kernochan, Zalman King, and Patricia Louisanna Knop. The film is based on the 1978 memoir of the same name by Austrian-American author Ingeborg Day. It stars Kim Basinger as Elizabeth McGraw and Mickey Rourke as John Gray. McGraw is a New York City art gallery employee who has a brief yet intense affair with a mysterious Wall Street broker. The film was completed in 1984, but not released until February 1986.
Document 6: The Happy Hooker (film): The Happy Hooker is a 1975 biographical-comedy film directed by Nicholas Sgarro and starring Lynn Redgrave. It was adapted from a best-selling book based on the life of Xaviera Hollander.
Document 7: The Happy Ending: The Happy Ending is a 1969 drama film written and directed by Richard Brooks, which tells the story of a repressed housewife who longs for liberation from her husband and daughter. It stars Jean Simmons (who received an Oscar nomination), John Forsythe, Shirley Jones, Lloyd Bridges and Teresa Wright.
Document 8: Heidi Fleiss: Heidi Lynne Fleiss (born December 30, 1965) is an American former madam, and also a columnist and television personality regularly featured in the 1990s in American media. She ran a prostitution ring based in Los Angeles, California, and is often referred to as the "Hollywood Madam".
Document 9: Vanessa de Oliveira: Vanessa de Oliveira (born 12 March 1975) is a Brazilian writer and former call girl.
Document 10: Superstar in a Housedress: Superstar in a Housedress (2004) is a feature-length documentary by independent filmmaker Craig Highberger about the life and legend of Warhol superstar Jackie Curtis. Highberger also wrote the biography of the same name, published by Penguin imprint Chamberlain Bros. in 2005. The film includes interviews with surviving superstars Holly Woodlawn, Penny Arcade and Joe Dallesandro; as well as Paul Morrissey, the director of the Warhol films "Flesh" and "Women In Revolt" that Jackie appeared in; and Tony Award winners Harvey Fierstein, and Lily Tomlin who also narrates. The film also includes twenty friends and colleagues of Curtis who round out the story of the artist's life. Rare footage includes Curtis performing in "Vain Victory", "Heaven Grand in Amber Orbit", and "Glamour, Glory and Gold".
Document 11: Full Service (book): Full Service: My Adventures in Hollywood and the Secret Sex Lives of the Stars is a "tell all" book about the sex lives of Hollywood stars from the late 1940s to the early 1980s by Scotty Bowers, with Lionel Friedberg as a contributing author. Bowers makes many claims about the sex lives of many people, most of whom were associated with the Hollywood movie industry during that period. The book, which was vetted by a libel lawyer before publication, was refused by several publishers before ultimately being accepted by Grove Press and Grove/Atlantic. Matt Tyrnauer, director of "", is currently in production on a documentary film about Bowers's life.
Document 12: The Intimate Adventures of a London Call Girl: The Intimate Adventures of a London Call Girl are memoirs of a former London call girl written by Dr. Brooke Magnanti, under the pseudonym "Belle de Jour".
Document 13: Dangerous Beauty: Dangerous Beauty is a 1998 American biographical drama film directed by Marshall Herskovitz and starring Catherine McCormack, Rufus Sewell, and Oliver Platt. Based on the non-fiction book "The Honest Courtesan" by Margaret Rosenthal, the film is about Veronica Franco, a courtesan in sixteenth-century Venice who becomes a hero to her city, but later becomes the target of an inquisition by the Church for witchcraft. The film features a supporting cast that includes Fred Ward, Naomi Watts, Moira Kelly and Jacqueline Bisset. The film was released as A Destiny of Her Own in some regions, and was retitled The Honest Courtesan for its UK video release.
Document 14: Josephine Mutzenbacher: Josephine Mutzenbacher – The Life Story of a Viennese Whore, as Told by Herself (German: "Josefine Mutzenbacher oder Die Geschichte einer Wienerischen Dirne von ihr selbst erzählt" ) is an erotic novel first published anonymously in Vienna, Austria in 1906. The novel is famous in the German-speaking world, having been in print in both German and English for over 100 years and sold over 3 million copies, becoming an erotic bestseller.
Document 15: Xaviera Hollander: Xaviera Hollander (born 15 June 1943) is a former call girl, madam, and author. She came to be best known for her best-selling memoir "The Happy Hooker: My Own Story."
ground_truth: Xaviera Hollander