Given the task definition and input, reply with output. 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'.

Passage: He was the tenor soloist in Voices of Exile, Richard Blackford's cantata for soloists, chamber orchestra, tape and choir, performed by the chamber choirs CONSONO () and CONSTANT, conducted by Harald Jers, at the music festival "Klangvocal" (vocal sound) in Dortmund. In 2010, he performed at the Staatsoper Stuttgart in the German premiere of Elena Kats-Chernin opera The Rage of Life. His opera roles include Mozart's Don Ottavio and Belmonte. With the Munchener Bach-Chor he performed a program around Mozart's Requiem, including compositions of Enjott Schneider, in the Philharmonie at the Gasteig, stepping in for Thomas Michael Allen. He was the Evangelist in the St Matthew Passion in the Berliner Philharmonie on 28 March 2010. In 2011, he appeared in the in Handel's Israel in Egypt with the Bach-Verein Koln (). He sang in Bach's Mass in B minor, performed in the Johanneskirche Dusseldorf and Trinitatiskirche Cologne to celebrate the 10th anniversary of the chamber choir CONSONO. He performed the tenor part of Handel's Messiah in St. Martin, Idstein, with Katia Plaschka, Andreas Scholl and Markus Flaig.
Link Information: none Question: Which of Ulrich Cordes opera roles had the highest attendance?
Answer: none