Assertion: choir | /r/CapableOf | collaborate with hansruedi willisegger
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text: The choir has traveled extensively and toured dozens of countries in Europe, North America and Asia, as well as Israel and collaborated with renowned conductors such as Tõnu Kaljuste, Osmo Vänskä, Lukas Foss, László Heltay, Robert King, Timothy Brown, Gustav Sjökvist, Willi Gohl, Hansruedi Willisegger, Johan Dujick, Petri Sakari and Thomas Adés.