Question: What American composer wrote both "Rhapsody in Blue" and "An American in Paris"

full_context: Document 1: George Gershwin: George Jacob Gershwin ( ; September 26, 1898 July 11, 1937) was an American composer and pianist. Gershwin's compositions spanned both popular and classical genres, and his most popular melodies are widely known. Among his best-known works are the orchestral compositions "Rhapsody in Blue" (1924) and "An American in Paris" (1928) as well as the opera "Porgy and Bess" (1935).
Document 2: Hershey Felder: Hershey Felder (born July 9, 1968) is a Canadian pianist, actor, playwright, composer, producer, and director. He created (as playwright, actor, and pianist) the role of American composer George Gershwin for the theatrical stage in the play "George Gershwin Alone", which was followed by the creation of the roles of Fryderyk Chopin, the Polish composer-pianist; Ludwig van Beethoven and Gerhard von Breuning in "Beethoven"; Leonard Bernstein in "Maestro Bernstein"; Franz Liszt in "Musik"; Irving Berlin in "Hershey Felder as Irving Berlin"; and Piotr Ilyich Tchaikovsky in "Our Great Tchaikovsky". "The Composer Sonata" comprises these works.
Document 3: Porgy and Bess: A Symphonic Picture: Arranged by Gershwin's good friend and sometimes assistant Robert Russell Bennett in 1942, Porgy and Bess: A Symphonic Picture includes most of the best-known songs from the Gershwin opera "Porgy and Bess", although not exactly in the order of their appearance. Though the Symphonic Picture is sometimes dismissed as a sequence of the opera's "greatest hits," the first well-known melody, "Summertime," is not heard until nearly seven minutes into the work. While some of the more esoteric parts of the opera are absent, much of the catchier tunes can be heard only in this suite and not in others, as Gershwin neglected to include them in his "Catfish Row Suite", which tended to highlight the more cerebral elements of the work.
Document 4: American Composer Series: The American Composer Series is an ongoing performance series in the cabaret revue format, paying tribute to the greatest composers of popular American music on the American scene, particularly those composers associated with Tin Pan Alley. Launched by musical director Earl Wentz in 2000 with a tribute to Ray Henderson (composer of mega-hits “Life is Just a Bowl of Cherries,” “Bye Bye Blackbird,” “Button Up Your Overcoat,” “The Birth of the Blues” and others) titled "It’s the Cherries", the series has continued to add new shows to its repertoire at the rate of one or two per year. As of 2009, the American Composer Series had created some 15 original revue tributes, many of them returning for multiple runs over the years.
Document 5: Rhapsody in Blue (disambiguation): Rhapsody in Blue is a musical composition by American composer George Gershwin.
Document 6: Summertime (George Gershwin song): "Summertime" is an aria composed in 1934 by George Gershwin for the 1935 opera "Porgy and Bess". The lyrics are by DuBose Heyward, the author of the novel "Porgy" on which the opera was based, although the song is also co-credited to Ira Gershwin by ASCAP.
Document 7: Aaron Copland: Aaron Copland ( ; November 14, 1900December 2, 1990) was an American composer, composition teacher, writer, and later a conductor of his own and other American music. Copland was referred to by his peers and critics as "the Dean of American Composers." The open, slowly changing harmonies in much of his music are typical of what many people consider to be the sound of American music, evoking the vast American landscape and pioneer spirit. He is best known for the works he wrote in the 1930s and 1940s in a deliberately accessible style often referred to as "populist" and which the composer labeled his "vernacular" style. Works in this vein include the ballets "Appalachian Spring", "Billy the Kid" and "Rodeo", his "Fanfare for the Common Man" and Third Symphony. In addition to his ballets and orchestral works, he produced music in many other genres including chamber music, vocal works, opera and film scores.
Document 8: Rhapsody in Blue (film): Rhapsody in Blue is a 1945 fictionalized screen biography of the American composer and musician George Gershwin (September 26, 1898 – July 11, 1937) released by Warner Brothers.
Document 9: Gershwin (disambiguation): George Gershwin (1898–1937), American composer, author of famous works such as "Rhapsody in Blue" and "An American in Paris"
Document 10: I Got Plenty o' Nuttin': "I Got Plenty o' Nuttin'" is a song composed in 1934 by George Gershwin for the 1935 "folk-opera" "Porgy and Bess" (1934). The lyrics are by DuBose Heyward, the author of the novel "Porgy" on which the opera was based, and Ira Gershwin. It is one of the most famous songs from the opera (along with "Summertime," "It Ain't Necessarily So", and "Bess, You Is My Woman Now") and it has been recorded by hundreds of singers and music groups.
Document 11: Rhapsody in Blue: Rhapsody in Blue is a 1924 musical composition by American composer George Gershwin for solo piano and jazz band, which combines elements of classical music with jazz-influenced effects.
Document 12: Scott Joplin: Scott Joplin ( ; 1867/68 or November 24, 1868– April 1, 1917) was an African-American composer and pianist. Joplin achieved fame for his ragtime compositions and was dubbed the "King of Ragtime". During his brief career, he wrote 44 original ragtime pieces, one ragtime ballet, and two operas. One of his first, and most popular pieces, the "Maple Leaf Rag", became ragtime's first and most influential hit, and has been recognized as the rag.
Document 13: George Antheil: George Antheil ( ; July 8, 1900 – February 12, 1959) was an American avant-garde composer, pianist, author and inventor whose modernist musical compositions explored the modern sounds – musical, industrial, mechanical – of the early 20th century.
Document 14: Gershwin Theatre: The Gershwin Theatre is a Broadway theatre located at 222 West 51st Street in midtown-Manhattan in the Paramount Plaza building. The theatre is named after brothers George Gershwin, a composer, and Ira Gershwin, a lyricist. It has the largest seating capacity of any Broadway theatre with 1,933 seats.
Document 15: Second Rhapsody: The Second Rhapsody is a concert piece for orchestra with piano by American composer George Gershwin, written in 1931. It is sometimes referred to by its original title, "Rhapsody in Rivets".
ground_truth: George Gershwin