latter half of the century, the theatre began to be cleaned up, with less prostitution hindering the attendance of the theatre by women. Gilbert and Sullivan's family-friendly comic opera hits, beginning with H.M.S. Pinafore in 1878, were imported to New York (by the authors and also in numerous unlicensed productions). They were imitated in New York by American productions such as Reginald Dekoven's Robin Hood (1891) and John Philip Sousa's El Capitan (1896), along with operas, ballets, and other British and European hits. Charles H. Hoyt's A Trip to Chinatown (1891) became Broadway's long-run champion when it surpassed Adonis and its 603 total performances in 1893, holding the stage for 657 performances. Chinatown itself was surpassed by the musical Irene (1919) in 1921 as the longest-running Broadway musical, and even earlier, in March 1920, by Lightnin' (1918) as the longest-running Broadway show. In 1896, theatre owners Marc Klaw and A. L. Erlanger formed the Theatrical Syndicate, which controlled almost every legitimate theatre in the U.S. for the next sixteen years. However, smaller vaudeville and variety houses proliferated, and Off-Broadway was well established by the end of the 19th century. A Trip to Coontown (1898) was the first musical comedy entirely produced and performed by African Americans in a Broadway theatre (largely inspired by the routines of the minstrel shows), followed by the ragtime-tinged Clorindy: The Origin of the Cakewalk (1898), and the highly successful In Dahomey (1902). Hundreds of musical comedies were staged on Broadway in the 1890s and early 1900s made up of songs written in New York's Tin Pan Alley involving composers such as Gus Edwards, John Walter Bratton, and George M. Cohan (Little Johnny Jones (1904), 45 Minutes From Broadway (1906), and George Washington Jr. (1906)). Still, New York runs continued to be relatively short, with a few exceptions, compared with London runs, until World War I. A few very successful British musicals continued to achieve great success in New York, including Florodora in 1900–01. Early 20th century In the early years of 20th century, translations of popular late-19th century continental operettas were joined by the "Princess Theatre" shows of the 1910s, by writers such as P. G. Wodehouse, Guy Bolton, and Harry B. Smith. Victor Herbert, whose work included some intimate musical plays with modern settings as well as his string of famous operettas (The Fortune Teller (1898), Babes in Toyland (1903), Mlle. Modiste (1905), The