Question: Consider the opera company for which Jacqueline Royer sand leading contralto and mezzo-soprano. Who founded that company?
Sentence (from "Jacqueline Royer"): Active on the stage from 1904 until 1924, she created several roles in early 20th century operas, including Carmine in the posthumous premiere of Ponchielli's "I Mori di Valenza".
Relevant evidence: No