Question:  George Alfred Maran attended Harvard University where he and his voice came to the attention of a prolific German composer whose most popular work was written in what year?
Sentence (from "Paul Hindemith"): Notable compositions include his song cycle "Das Marienleben" (1923), "Der Schwanendreher" for viola and orchestra (1935), and opera "Mathis der Maler" (1938).
Relevant evidence: No