Question: The husband of Verna Avey composed how many symphonies?
Related documents: [0]  [DOC] 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. [END] 
[1]  [DOC] 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. [END] 
Answer: 
five
five