Question: Why did the composer of song Prometheus (Art Song) die?
Sentence (from "Franz Schubert"): His major works include the Piano Quintet in A major, D. 667 ("Trout Quintet"), the Symphony No. 8 in B minor, D. 759 ("Unfinished Symphony"), the ”Great” Symphony No. 9 in C major, D. 944, the three last piano sonatas (D. 958–960), the opera "Fierrabras" (D. 796),
Relevant evidence: No