Question: Are Larry McMurtry and Sally Beauman both American writers?

full_context: Document 1: Larry McMurtry: Larry Jeff McMurtry (born June 3, 1936) is an American novelist, essayist, bookseller, and screenwriter whose work is predominantly set in either the old West or in contemporary Texas. His novels include "Horseman, Pass By" (1962), "The Last Picture Show" (1966) and "Terms of Endearment" (1975), which were adapted into films earning 26 Academy Award nominations (10 wins). His 1985 Pulitzer Prize-winning novel "Lonesome Dove" was adapted into a television miniseries that earned 18 Emmy Award nominations (seven wins), with the other three novels in his "Lonesome Dove" series adapted into three more miniseries, earning eight more Emmy nominations. McMurtry and cowriter Diana Ossana adapted the screenplay for "Brokeback Mountain" (2005), which earned eight Academy Award nominations with three wins, including McMurtry and Ossana for Best Adapted Screenplay.
Document 2: Sarra Manning: Sarra Manning is a writer from England. She attended the University of Sussex and took up an English with Media Studies degree. She became a freelance writer after submitting her work to "Melody Maker". She worked as the entertainment editor for five years of the now-defunct teen magazine "J-17". Manning was the editor of "Elle Girl" (UK edition), then re-launched "What To Wear" magazine for the BBC and has worked on UK magazines such as "Bliss" and "The Face". She's contributed to "ELLE", "Seventeen", "The Guardian" and "Details" and is a contributing editor to "ELLE UK" and writes regularly for "Grazia", "Red" and "Stella", as well as consulting for a number of British magazine publishers. She has been dubbed the "teen queen extraordinaire" following the release of her hit teen fiction book "Guitar Girl", and the popular "Diary of a Crush" trilogy. Her first adult novel, "Unsticky" was published by Headline in 2009. Her next teen novel, "Nobody's Girl" was published in 2010, and a second adult novel, "You Don't Have to Say You Love Me", was published in February 2011. Her third adult novel, titled "Nine Uses for an Ex-Boyfriend", was published in February 2012.
Document 3: Sally Beauman: Sally Vanessa Beauman (née Kinsey-Miles, 25 July 1944 – 7 July 2016) was an English journalist and writer, author of eight widely translated and best-selling novels.
Document 4: Louis L'Amour: Louis Dearborn L'Amour ( ; March 22 1908 –June 10 1988) was an American novelist and short story writer. His books consisted primarily of Western novels (though he called his work 'frontier stories'); however, he also wrote historical fiction ("The Walking Drum"), science fiction ("The Haunted Mesa"), non-fiction ("Frontier"), as well as poetry and short-story collections. Many of his stories were made into films and John Wayne once made the dubious assertion that L'Amour was the most interesting man in the world. L'Amour's books remain popular and most have gone through multiple printings. At the time of his death almost all of his 105 existing works (89 novels, 14 short-story collections, and two full-length works of nonfiction) were still in print, and he was considered "one of the world's most popular writers".
Document 5: Suzanne Goodwin: Suzanne Goodwin, née Suzanne Ebel (27 September 1916 – 28 February 2008), was a British writer of over 40 romantic novels and was translated into some 15 languages. Under her maiden name she wrote contemporary romances and British guides, under her married name historical romances, she also used the pseudonym of Cecily Shelbourne. In 1964, her novel "Journey from Yesterday" won the Romantic Novel of the Year Award awarded by the Romantic Novelists' Association. and in 1986 the British Travel Association Award.
Document 6: All the Pretty Horses (novel): All the Pretty Horses is a novel by American author Cormac McCarthy published by Alfred A. Knopf in 1992. Its romanticism (in contrast to the bleakness of McCarthy's earlier work) brought the writer much public attention. It was a bestseller, and it won both the U.S. National Book Award
Document 7: Sally Kirkland (editor): Sally Kirkland (1 July 1912 – 1 May 1989) was a manager at Lord & Taylor, a fashion editor at "Vogue" magazine and served as the only fashion editor at "Life" magazine between 1947 and 1969.
Document 8: List of accolades received by Brokeback Mountain: "Brokeback Mountain" is a 2005 American epic romantic drama film directed by Ang Lee. Based on the short story of the same name by author Annie Proulx, the story was adapted by Larry McMurtry and Diana Ossana. The film depicts the complex emotional and sexual relationship between two men, Ennis Del Mar and Jack Twist (played by Heath Ledger and Jake Gyllenhaal, respectively) in the American West between 1963 and 1983. Michelle Williams, Anne Hathaway, Linda Cardellini, Randy Quaid, Anna Faris, and Kate Mara feature in supporting roles.
Document 9: Cormac McCarthy: Cormac McCarthy (born Charles McCarthy; July 20, 1933) is an American novelist, playwright, and screenwriter. He has written ten novels, spanning the Southern Gothic, Western, and post-apocalyptic genres.
Document 10: Streets of Laredo (miniseries): Larry McMurtry's Streets of Laredo is a 1995 American Western television miniseries directed by Joseph Sargent. It is a three-part adaptation of the 1993 novel of the same name by author Larry McMurtry and is the third installment in the Lonesome Dove series serving as a direct sequel to "Lonesome Dove" (1989), ignoring the events of "Return to Lonesome Dove" (1993).
Document 11: Spur Award: Spur Awards are literary prizes awarded annually by the Western Writers of America (WWA). The purpose of the Spur Awards is to honor writers for distinguished writing about the American West. The Spur awards began in 1953, the same year the WWA was founded. An author need not be a member of the WWA to receive a Spur Award. Among previous Spur Award winners are Larry McMurtry for "Lonesome Dove", Michael Blake for "Dances with Wolves", Glendon Swarthout for "The Shootist", and Tony Hillerman for "Skinwalkers".
Document 12: List of prolific writers: Some writers have had prolific careers with hundreds of their works being published. While some best-selling authors have written a small number of books that have sold millions of copies, others have had lengthy careers and maintained a high level of output year after year. Dame Agatha Christie, the most-published novelist in history, is estimated to have sold 4 billion books, having written 69 novels and 19 plays. Her works were published between 1920 and 1976, equating to around three publications every two years. Dame Barbara Cartland has also sold millions of copies of her books but wrote many more than Christie. She spent 80 years as a novelist with 722 books published, averaging one book released every 40 days of her career. While Cartland wrote a significant number of full-length novels, other authors have been published many more times but have specialised in short stories. Spanish author Corín Tellado wrote over 5,000 novellas, selling 400 million copies of her books.
Document 13: Diana Ossana: Diana Lynn Ossana is an American writer who has collaborated on writing screenplays, teleplays, and novels with author Larry McMurtry since they first worked together in 1992, on the semi-fictionalized biography "Pretty Boy Floyd". She won a Best Adapted Screenplay Oscar or Academy Award, a Writers' Guild of America Award, a BAFTA Award and a Golden Globe Award for her screenplay of Ang Lee's "Brokeback Mountain", along with McMurthy and adapted from the short story of the same name by Annie Proulx. She is a published author in her own right of several short stories and essays.
Document 14: Barbara Cartland: Dame Mary Barbara Hamilton Cartland DBE CStJ (9 July 1901 – 21 May 2000) was an English author of romance novels, one of the best-selling authors as well as one of the most prolific and commercially successful worldwide of the twentieth century. Her 723 novels were translated into 38 languages and she continues to be referenced in the "Guinness World Records" for the most novels published in a single year in 1976. As Barbara Cartland she is known for her numerous romantic novels but she also wrote under her married name of Barbara McCorquodale and briefly under the pseudonym of Marcus Belfry. She wrote more than 700 books, as well as plays, music, verse, drama, magazine articles and operetta, and was a prominent philanthropist. She reportedly sold more than 750 million copies. Other sources estimate her book sales at more than two billion copies. She specialised in 19th-century Victorian era pure romance. Her novels all featured portrait-style artwork, particularly the cover art, usually designed by Frances Marshall.
Document 15: Beryl Bainbridge: Dame Beryl Margaret Bainbridge DBE (21 November 1932 – 2 July 2010) was an English writer from Liverpool. She was primarily known for her works of psychological fiction, often macabre tales set among the English working class. Bainbridge won the Whitbread Awards prize for best novel in 1977 and 1996; she was nominated five times for the Booker Prize. She was described in 2007 as "a national treasure". In 2008, "The Times" named Bainbridge on their list of "The 50 greatest British writers since 1945".
ground_truth: no