Question: John Stoddart designed the stage for what five-act grand opera?
Sentence (from "Don Carlos"): Don Carlos is a five-act grand opera composed by Giuseppe Verdi to a French-language libretto by Joseph Méry and Camille du Locle, based on the dramatic play "Don Carlos, Infant von Spanien" ("Don Carlos, Infante of Spain") by Friedrich Schiller.
Relevant evidence: Yes