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: How many years did the war last for which the 60th anniversary of its end was celebrated by the 2005 European Stars' Tour? Passage:Kalivodová first worked with the Prague State Opera in 2001, as part of the Pounding on the Iron Curtain project, a production of two operas by Vladimir Wimmer. In 2002 she made her first appearance at the National Moravian-Silesian Theatre in Ostrava, playing Kontshakovna in the opera Prince Igor. Later the same year she performed the role of Amastrys in Opera Praha's production of Xerxes, which toured Germany, Switzerland, France and Luxembourg. In December 2003 she performed with Leo Nucci of the New York Metropolitan Opera at the Žofín Palace in Prague, followed by an appearance at the Konzerthaus in Vienna in June 2004 to mark the accession of the Czech Republic to the European Union. Kalivodová has since then performed around the world, including the Centre for Fine Arts in Brussels, and the State Kremlin Palace in Moscow, as well as concerts in Japan and the United States, and joined the European Stars' Tour in 2005, celebrating the 60th anniversary of the end of the Second World War. 


b