Teacher:In this task, you're given a passage, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both passage and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the passage or linked information.
Teacher: Now, understand the problem? Solve this instance: Passage: In 1944, she returned to Switzerland, singing as the leading dramatic contralto at the Opernhaus Zurich. She appeared as Brangane in Wagner's Tristan und Isolde, as Fricka in his Die Walkure, as Ortrud in his Lohengrin, and in the title role (Octavian) of Der Rosenkavalier by Richard Strauss, among others. In 1949, she took part in the premiere of Willy Burkhard's Die schwarze Spinne. The same year, she performed in Monteverdi's L'incoronazione di Poppea, both at Vicenza's Teatro Olimpico and at La Fenice in Venice. She performed as a guest at La Scala in Milan several times, including Octavian, Brangane, Venus in Wagner's Tannhauser, and the title role of Honegger's Judith. She appeared as a guest at the Vienna State Opera, in Belgium, France, United Kingdom, in Argentina, and the US.
Link Information: t was composed between 1857 and 1859 Answer: Lohengrin,
Student:
Which of Wagner's operas that Cavelti starred in was written first?