Task: Text Categorization
Input (English): This composer imitated the song of a starling in a sextet whose score is rife with incorrect notes, A Musical Joke, and he wrote his clarinet concerto in A major for Anton Stadler. This man composed a fugue based on five themes in the fourth movement of his last symphony. His eleventh piano sonata ends with a "rondo alla turca."  Franz Sussmayer completed this composer's Requiem in D minor, which was left unfinished at his early death. For  10 points, name this Austrian composer of the Haffner, Prague, and Jupiter symphonies as well as the operas Don Giovanni and The Magic Flute.
Output (English): Fine Arts