Question: How many acts are in the opera based on an 1820 poem by Alexander Pushkinhave, in which Mariya Matveyevna Stepanova created the lead soprano role?
Sentence (from "Elisabeth Söderström"): She was particularly well known for her recordings of the lead soprano roles in the three Janáček operas "Jenůfa", "Káťa Kabanová", and "The Makropoulos Affair", all of which received "Gramophone" Awards.
Relevant evidence: No