Question: Iphigénie en Tauride and Un re in ascolto, are which type of dramatic musical theater?
Sentence (from "Iphigénie en Tauride"): Iphigénie en Tauride ("Iphigenia in Tauris") is a 1779 opera by Christoph Willibald Gluck in four acts.
Relevant evidence: Yes