Definition: In this task, you're given a question, along with three passages, 1, 2, and 3. Your job is to determine which passage can be used to answer the question by searching for further information using terms from the passage. Indicate your choice as 1, 2, or 3.
Input: Question: When did the opera house where  Elsa Cavelti sang leading dramatic contralto in 1944 open? Passage 1:In 1944, she returned to Switzerland, singing as the leading dramatic contralto at the Opernhaus Zürich. She appeared as Brangäne in Wagner's Tristan und Isolde, as Fricka in his Die Walküre, 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, Brangäne, Venus in Wagner's Tannhäuser, 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.
 Passage 2:Eduard Jan Bomhoff was born on 30 September 1944 in Amsterdam in a Old Catholic family as the son of Jacobus Gerardus Bomhoff a Minister and professor of literature and Riet van Rhijn. The family moved in 1957 to Leiden. Bomhoff attended the Stedelijk Gymnasium Leiden and went to Leiden University. After earning a Master of Economics there he received the Doctor of Philosophy degree in economics from the Erasmus University Rotterdam in 1979. Bomhoff worked as a lecturer in monetary policy there. He earned the rank of professor in 1981, and served as director of the Rochester-Erasmus Executive Master of Business Administration program from 1986 to 1989. He later served as a professor of finance at the Nyenrode Business Universiteit. In addition to his academic career, Bomhoff founded the institute in 1995, an economic research institute designed as an alternative to the official Bureau for Economic Policy Analysis. Bomhoff was also a columnist for the NRC Handelsblad from 1989 until 2002.
 Passage 3:"Don't Be So Hard on Yourself" was written by Jess Glynne, Wayne Hector with its producers Tom Barnes, Peter Kelleher and Ben Kohn, also known as the production team TMS. According to the sheet music published at Musicnotes.com by Universal Music Publishing Group, the song is written in the key of G major (recorded a half-step lower in F major). The song moves in common time at a tempo of 120 beats per minute, with Glynne's vocal range spanning from the low-note of C to the high-note of C. Its instrumentation consists in piano, guitar and violins, filled with strings, glittery synths and emotive vocals. In its bridge, the song also features a "multi-tracked choir and military tattoo drums." It is a dance-pop song with influences of disco, house and soul-pop. Lyrically, it talks about overcoming a broken heart and to not let sadness defeat you. In the chorus, she sings: "Don’t be so hard on yourself, no / Learn to forgive, learn to let go / Everyone trips, everyone falls / So don’t be so hard on yourself, no." When asked about the story behind the song, she elaborated: "When I was meeting my publisher, managers and label and everything was happening for me, I was going through a really hard time. I had my heart broken and I was in a dark place. It was even harder because my dreams were coming true and I had to put a smile on my face every day and power through."

Output:
1