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Ballet dancers Yen Han, left, and Arman Grigoryan, right, perform on stage during rehearsal of the play Kazimir's Colours at the Opernhaus in Zuerich Thursday, May 10, 2007. The Zurich Ballet of Heinz Spoerli shows "Kazimir's Colours", after Bigonzetti and Schostakowitsch. Opening night was Saturday, May 12, 2007. 2007. (KEYSTONE/Alessandro Della Bella)