Task: Text Categorization
Input (English): In one work by this composer, the overture of a Richard Wagner opera is intentionally mangled as if being sight-read by a spa orchestra early in the morning. One of this composer's important early works is a setting of a fifteen-poem cycle about the life of the Virgin Mary, Das Marienleben. William Furtwangler's attempted staging of an opera by this composer eventually culminated in his resignation from the Staatsoper and Berlin Philharmoniker. Another work by this composer includes twelve fugues with eleven linking interludes and a prelude and postlude that are retrograde inversions of each other. This composer was a leading proponent of Gebrauchsmusik,  and often played in a trio with Szymon Goldberg and Emanuel Feuermann. Yet another work by this composer was written in just six hours upon hearing of the death of King George V and is scored for orchestra and viola, an instrument of which he was a master. That work is Trauermusik,  and other works include Ludus Tonalis and Symphonic Metamorphosis on Themes by Carl Maria von Weber. For 10 points, identify this righteous anti- dodecaphonist whose first symphony was based on themes from his opera Mathis der Maler.
Output (English): Fine Arts