Question: What American composer born in 1895 was married to his frequent collaborator Verna Arvey?

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: C. William Harwood: C. William Harwood (March 14, 1948, Richmond, Virginia - April 26, 1984, Little Rock, Arkansas) was an American conductor. Chiefly remembered for his work as an opera conductor, he notably conducted the Houston Grand Opera's groundbreaking 1977 national tour of George Gershwin's "Porgy and Bess". He also conducted the world premieres of operas by Claude Debussy, Frederick Delius, Stephen Paulus, and George Rochberg.
Document 3: Frederick Douglass (Ulysses Kay opera): Frederick Douglass is an opera in three acts composed by Ulysses Kay to a libretto by Donald Dorr. Its story is a semi-fictionalized account of the final years in the life of Frederick Douglass after his marriage to his second wife, Helen Pitts Douglass. The opera premiered on April 12, 1991 at Newark Symphony Hall performed by the New Jersey State Opera in a production directed by Louis Johnson and designed by Salvatore Tagliarino.
Document 4: Symphony No. 1 &quot;Afro-American&quot;: Symphony No. 1 in A-flat, "Afro-American" (1930) by William Grant Still was the first symphony written by an African American and performed for a United States audience by a leading orchestra. It was premiered in 1931 by the Rochester Philharmonic Orchestra. It is a symphonic piece for full orchestra, including celeste, harp, and tenor banjo. It combines a fairly traditional symphonic form with blues progressions and rhythms that were characteristic of popular African-American music at the time. This combination expressed Still's integration of black culture into the classical forms. Still used quotes from four dialect poems by early 20th-century African-American poet Paul Laurence Dunbar as epigraphs for each symphonic movement.
Document 5: Verna Arvey: Verna Arvey (February 16, 1910 – November 22, 1987) was an American librettist, pianist and writer who is best known for her musical collaborations with her husband William Grant Still, a musician and composer.
Document 6: William Grant Still: William Grant Still (May 11, 1895 – December 3, 1978) was an American composer, who composed more than 150 works, including five symphonies and eight operas.
Document 7: Mississippi Opera: The Mississippi Opera is an American opera company located in Jackson, Mississippi. Founded in 1945, the company presents an annual season of opera consisting of two fully staged opera productions and smaller concerts and workshops open to the public. The company's productions are performed at the Belhaven University Center for the Arts. Composer William Grant Still and soprano Leontyne Price both have associations with the company.
Document 8: The Legend (opera): The Legend is a one-act tragic opera composed by Joseph Carl Breil to an English libretto by Jacques Byrne. It premiered at the Metropolitan Opera in New York City on March 12, 1919 in a triple bill with two other one-act operas, John Hugo's "The Temple Dancer" and Charles Cadman's "Shanewis". Its melodramatic story is set in Muscovadia, a mythical country in the Balkans, and involves an impoverished nobleman turned bandit, his daughter Carmelita, and her lover Stephen, a captain in the hussars. The action unfolds over a single night at the end of which both lovers are dead—Stephen stabbed to death by Carmelita and Carmelita shot by Stephen's fellow hussars. The only one of Breil's six operas to be performed by a major opera company, "The Legend" received scathing press reviews and after its three performances at the Met disappeared from the repertory.
Document 9: A Bayou Legend: A Bayou Legend is an American opera composed by William Grant Still, with a libretto by his wife and frequent collaborator, Verna Arvey.
Document 10: Carry Nation (opera): Carry Nation is an opera in a prologue and 2 acts by composer Douglas Moore which is based on the life of temperance activist Carrie Nation, whose sometimes spelled her first name "Carry". The work uses an English-language libretto by W. N. Jayme. The opera was commissioned by the University of Kansas in commemoration of the school's 100th anniversary. The premiere performance was given at KU's Murphy Hall on March 28, 1966 with a cast headlined by four professional opera singers brought in for the event, and the supporting cast supplied by KU's music and theatre students. Lewin Goff staged the production and Robert Baustian conducted. The opera was subsequently given its first professional production at the San Francisco Opera in June 1966 under the baton of Herbert Grossman. The New York City Opera mounted the first New York production in March 1968 and released a recording of the work in 1969. All three of these initial stagings and the recording starred mezzo-soprano Beverly Wolff in the title role.
Document 11: Paul Bunyan (operetta): Paul Bunyan, Op 17, is an operetta in two acts and a prologue composed by Benjamin Britten to a libretto by W. H. Auden, designed for performance by semi-professional groups. It premiered at Columbia University on 5 May 1941, to largely negative reviews, and was withdrawn by the composer. Britten revised it somewhat in 1976 and subsequently it had numerous performances and two commercial recordings. The story is based on the folkloric American lumberjack, Paul Bunyan, with the music incorporating a variety of American styles, including folk songs, blues and hymns. The work is strongly sectional in nature, highly reminiscent of the 'Broadway musical' style of the period.
Document 12: Troubled Island: Troubled Island is an American opera in three acts composed by William Grant Still, with a libretto begun by poet Langston Hughes and completed by Verna Arvey. She married the composer following their collaboration.
Document 13: The Juggler of Our Lady (opera): The Juggler of Our Lady is an opera in one act composed by Ulysses Kay to a libretto by Alexander King. The libretto is based on Robert O. Blechman's 1953 book "The Juggler of Our Lady. A Medieval Legend". Composed in 1956, the opera premiered on 23 February 1962 in New Orleans, Louisiana performed by the Xavier University Opera Workshop. It was performed again in 1972 by Opera/South in Jackson Mississippi in a double bill with William Grant Still's opera "Highway 1, U.S.A.". The 1972 performance of both operas was also broadcast on Voice of America.
Document 14: 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 15: A Wedding (opera): A Wedding is a comic opera based on Robert Altman's 1978 film "A Wedding" and was composed by William Bolcom with a libretto written by Robert Altman and Arnold Weinstein.
ground_truth: William Grant Still