Question: What nationality/style of Opera did both Alessandro Scarlatti and Christoph Willibald Gluck compose?
Sentence (from "Christoph Willibald Gluck"): Christoph Willibald (Ritter von) Gluck (] ; 2 July 1714 – 15 November 1787) was a composer of Italian and French opera in the early classical period.
Relevant evidence: Yes