Question: Mariya Matveyevna Stepanova created the leading soprano role in which opera based on a 1820 poem?
Sentence (from "Emma Howson"): Emma Howson (28 March 1844 – 28 May 1928) was an Australian opera singer and actress primarily known as the creator of the principal soprano role of Josephine in the Gilbert and Sullivan comic opera "H.M.S. Pinafore".
Relevant evidence: No