Answer the following question: Information: - United Artists (UA) is an American film and television entertainment studio. The studio was founded in 1919 by D.W. Griffith, Charlie Chaplin, Mary Pickford and Douglas Fairbanks with the intention of controlling their own interests rather than depending upon commercial studios. The studio was repeatedly bought, sold and restructured over the ensuing century. - At the Circus ( also called The Marx Brothers at the Circus ) is a 1939 Marx Brothers comedy film released by Metro - Goldwyn - Mayer in which they save a circus from bankruptcy . The movie is notable for Groucho Marx 's classic rendition of '' Lydia the Tattooed Lady '' . The supporting cast includes Margaret Dumont , Eve Arden , Florence Rice and Kenny Baker . - "Lydia, the Tattooed Lady" is a 1939 song written by Yip Harburg and Harold Arlen. It first appeared in the Marx Brothers movie "At the Circus" (1939) and became one of Groucho Marx's signature tunes. - Harold Arlen (February 15, 1905 April 23, 1986) was an American composer of popular music, having written over 500 songs, a number of which have become known worldwide. In addition to composing the songs for the 1939 film "The Wizard of Oz" (lyrics by E.Y. Harburg), including the classic "Over the Rainbow", Arlen is a highly regarded contributor to the Great American Songbook. "Over the Rainbow" was voted the twentieth century's No. 1 song by the Recording Industry Association of America (RIAA) and the National Endowment for the Arts (NEA). - Metro-Goldwyn-Mayer Studios Inc. (abbreviated as MGM or M-G-M, also known as Metro-Goldwyn-Mayer Pictures, Metro-Goldwyn-Mayer or Metro, and for a former interval known as Metro-Goldwyn-Mayer/United Artists, or MGM/UA) is an American media company, involved primarily in the production and distribution of feature films and television programs. What is the relationship between 'at the circus' and 'harold arlen'?
Answer:
composer