William Mercer Cook (January 27, 1869 – July 19, 1944), better known as Will Marion Cook, was an African-American composer and violinist from the United States. Cook was a student of Antonín Dvořák and performed for King George V among others. He is probably best known for his popular songs and Broadway musicals, such as "" and "In Dahomey". Using only the above description and what you know about the world, "William Mercer Cook only performer for American audiences" is definitely correct, incorrect, or inconclusive? 