Definition: In this task, you're given a question, along with a context passage which has extra information available on certain terms mentioned in it, i.e., the proper nouns in the passage. Your job is to determine whether information from more than one term is needed to answer the question. Indicate your choice as `a` for Yes or `b` for No.
Input: Question: Which of Ulrich Cordes opera roles had the highest attendance? 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 Münchener 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 Köln (). He sang in Bach's Mass in B minor, performed in the Johanneskirche Düsseldorf 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.


a