Question: Who was mentored by Arnold Schoenberg and worked on the album "At the Grave of Richard Wagner"?
Sentence (from "Anton Webern"): As a tutor, Webern guided and variously influenced Arnold Elston, Frederick Dorian (Friederich Deutsch), Matty Niël, Fré Focke, Karl Amadeus Hartmann, Philipp Herschkowitz, René Leibowitz, Humphrey Searle, Leopold Spinner, and Stefan Wolpe.
Relevant evidence: No