Janis Martin
... that soprano Janis Martin appeared at the Zurich Opera as Isolde in Wagner's Tristan und Isolde?
... that soprano <b id="mwGD8"><a href="./Janis_Martin_(soprano)" id="mwGEA" rel="mw:WikiLink" title="Janis Martin (soprano)">Janis Martin</a></b> appeared at the <a class="mw-redirect" href="./Zurich_Opera" id="mwGEE" rel="mw:WikiLink" title="Zurich Opera">Zurich Opera</a> as Isolde in <a href="./Richard_Wagner" id="mwGEI" rel="mw:WikiLink" title="Richard Wagner">Wagner</a>'s <i id="mwGEM"><a href="./Tristan_und_Isolde" id="mwGEQ" rel="mw:WikiLink" title="Tristan und Isolde">Tristan und Isolde</a></i>?