In this task, you're given a passage, further information available on a particular linked term from the statement, and a question. Your job is to generate the answer to the question by using the information provided. If there is no clear answer obtainable, output 'none'.

Q: Passage: Keith Cerny is an American opera director and businessman. From 2004-2007 he was Executive Director and CFO of the San Francisco Opera and from 2010-2018 he was General Director of the Dallas Opera. In 2018 he was appointed General Director of the Calgary Opera. He is also the former CEO of Sheet Music Plus (2008-2010), the world's largest interest-based sheet-music company. He is a graduate of the University of California, Berkeley (B.A. in Music and B.S. in Physics), the Harvard Business School (M.B.A.), and the Open University in the United Kingdom (Ph.D. in Economic Development Studies/Econometrics). He also studied conducting, voice, and accompanying at the Guildhall School of Music and Drama in London and studied opera-accompanying in English National Opera's répétiteur training course. He also worked for McKinsey & Company for six years where he was a Senior Engagement Manager, and seven years with the consulting firm Accenture. He is also an Executive Board Member for Opera America.
 Link Information: The school was established in 1908.  Question: When did the school Cerny got his M.B.A. open?


A: Answer: 1908
****
Q: Passage: He moved to English club Liverpool for the start of the 2009–10 season but in August 2010, having received only limited playing time at Anfield due to injury, he returned to Italy and joined Juventus on loan until the end of the 2010–11 season. Aquilani returned to Liverpool at the end of the season as Juventus did not take up their purchase option. He went on loan again in 2011, playing for Italian club Milan for the 2011–12 season, and was subsequently sold to Fiorentina in 2012, where he remained until his transfer to Portuguese club Sporting CP in 2015; he returned to Italy in 2016, joining Pescara, and was later loaned to Sassuolo for the second half the season. In 2017, he joined Spanish club Las Palmas, but was released by the club at the end of the season. After a year without a club, he announced his retirement in 2019.
 Link Information: none Question: What position did he play for Juventus?

A: Answer: none
****
Q: Passage: 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.
 Link Information: The first permanent theatre, the , was built in 1834  Question: When did the opera house where  Elsa Cavelti sang leading dramatic contralto in 1944 open?

A:
Answer: 1834 
****