Task: Explanation
Input (English): William Martin (born 13 April 1898 – ?) was an American classical tenor. Born in Massachusetts, he studied singing with Leveret Merrill, A Sujol, and Florence Holtzman. A graduate of Harvard University, he was for many years a member of the Harvard Glee Club. He made his professional opera debut in 1923 in the title role of Jules Massenet's "Werther". He was committed to the Opéra-Comique in Paris from 1925-1929 where he notably sang the role of Philipp in the world premiere of Lucien Chevaillier's "Le poème du soir". In 1927 he and Mary McCormic became the first two Americans to appear in leading roles at the Opéra National de Paris, respectively portraying the title role and the role of Marguerite in Charles Gounod's "Faust". In 1929 he had a major success at the Palais Garnier as the Duke of Mantua in Giuseppe Verdi's "Rigoletto". In 1930 he sang Romeo to Grace Moore's Juliette in Gounod's "Roméo et Juliette" at the Opéra Royal de Wallonie. Martin is best remembered today for creating the role of Amelia's lover in the world premiere of Gian Carlo Menotti's "Amelia Goes to the Ball" on 1 April 1937 at the Philadelphia Academy of Music. Question: What opera that starred William Martin was based on a play written by William Shakespeare? Answer: Roméo et Juliette
Output (English):  In 1930 he sang Romeo to Grace Moores Juliette in Gounods Roméo et Juliette at the Opéra Royal de Wallonie.