text: The opening theme of this composer's Piano Sonata No. 8 is accompanied by A minor block triads in the left hand.
full_question: The opening theme of this composer's Piano Sonata No. 8 is accompanied by A minor block triads in the left hand. A horn concerto in D major is followed by three more in E-flat major that this composer wrote for the virtuoso Joseph Leutgeb. The nickname of his penultimate symphony contrasts it with his Symphony No. 25, the "little G minor." The F major Andante from his Elvira Madigan piano concerto is often excerpted as a separate piece. This composer's Piano Sonata No. 16 in C major is labelled "for beginners," while his Piano Sonata No. 11 ends with the Rondo alla Turca. For 10 points, name this composer of Eine kleine Nachtmusik.
first_sentence: The opening theme of this composer's Piano Sonata No. 8 is accompanied by A minor block triads in the left hand.
raw_answer: Wolfgang Amadeus Mozart