Question: Bethany Beardslee has performed classical music by which Austrian composer and theorist?
Sentence (from "Bethany Beardslee"): Bethany Beardslee (born December 25, 1925) is an American soprano particularly noted for her collaborations with major 20th-century composers, such as Igor Stravinsky, Milton Babbitt, Pierre Boulez, George Perle, Sir Peter Maxwell Davies and her performances of great contemporary classical music by Arnold Schoenberg, Alban Berg, Anton Webern.
Relevant evidence: Yes