Question: What play written by Tennessee Williams did Viola Keats star in?
Context: Viola Keats (1911–1998) was a British stage, film and television actress. " The Independent" called her "an actress of vigour and conviction."  After training at RADA, her first appearance on the London Stage was at the Apollo Theatre in 1933, in "The Distaff Side", and the following year she made her Broadway debut in the same play.  Her first screen appearance was in 1933 in "Too Many Wives", and she went on to have starring roles in films such as "A Woman Alone".  From the 1950s, her screen work was largely in television, but she continued to work throughout in the theatre, including an Australian tour of "A Streetcar Named Desire" as Blanche, and in the 1958 Agatha Christie play "Verdict" at the Strand Theatre.  She spent her retirement living in Brighton. His Grace Gives Notice is a 1933 British comedy film directed by Leslie S. Hiscott and based on the novel "His Grace Gives Notice" by Lady Laura Troubridge which had previously been adapted into a 1924 film.  It starred Arthur Margetson, Viola Keats, Charles Groves and Victor Stanley.  It was made as a quota quickie at Twickenham Studios. A Streetcar Named Desire is a 1947 play written by American playwright Tennessee Williams that received the Pulitzer Prize for Drama in 1948.  The play opened on Broadway on December 3, 1947, and closed on December 17, 1949, in the Ethel Barrymore Theatre.  The Broadway production was directed by Elia Kazan and starred Jessica Tandy, Marlon Brando, Karl Malden, and Kim Hunter.  The London production opened in 1949 with Bonar Colleano, Vivien Leigh, and Renee Asherson and was directed by Laurence Olivier.  The drama "A Streetcar Named Desire" is often regarded as among the finest plays of the 20th century, and is considered by many to be Williams' greatest. Double Wedding is a 1933 British comedy film directed by Frank Richardson and starring Joan Marion, Jack Hobbs and Viola Keats.  It was made at Teddington Studios as a quota quickie. A Woman Alone is a 1936 British drama film directed by Eugene Frenke and starring Anna Sten, Henry Wilcoxon and Viola Keats.  It was also released as Two Who Dared.  An officer becomes entangled in a love affair with a woman who works as a maid. Enemy of the Police is a 1933 British comedy film directed by George King and starring John Stuart, Viola Keats and A. Bromley Davenport.  It was made at Teddington Studios as a quota quickie by Warner Brothers. The Pointing Finger is a 1933 British drama film directed by George Pearson and starring John Stuart, Viola Keats and Leslie Perrins.  The screenplay concerns a man who plots to murder his half-brother so he can claim his earldom and an inheritance.  The film was made by Twickenham Film Studios.  Based on the novel "The Pointing Finger" (1907) by "Rita," it was a remake of the 1922 film of the same name. Too Many Millions (1934) is a British comedy drama film directed by Harold Young and starring Betty Compton, John Garrick and Viola Keats.  In an attempt to attract the attention of the artist she loves a wealthy woman assumes the disguise of a maid. Spring Storm is a 1937 play written by American playwright Tennessee Williams.  Tennessee Williams wrote "Spring Storm" when he was twenty-six years old, in 1937, while studying as an apprentice.  "Spring Storm" received poor reviews in Williams’s playwriting course, and it did not receive its first production until 1995 in Berkeley, California.  The European premiere took place at the Royal & Derngate Northampton on 15 October 2009, running alongside "Beyond the Horizon" by Eugene O'Neill.  Both productions subsequently transferred to the Royal National Theatre in 2010 to the Cottesloe Theatre.  Written and rewritten between 1937 and 1938, this full-length play depicts life and conflicted love in a small Mississippi Delta town during the Great Depression. Her Last Affaire is a 1935 British drama film directed by Michael Powell and starring Hugh Williams, Viola Keats, Cecil Parker and Googie Withers.  The wife of a politician is found dead at a country inn.  It was based on the play "S.O.S." by Walter Ellis.
Answer: A Streetcar Named Desire