Question: Are "Lady Macbeth of the Mtsensk District" and "Iphigénie en Tauride" both operas?
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