Helena Braun
... that when Helena Braun visited New York "just for the trip", she sang the role of Brünnhilde in Wagner's Die Walküre at the Metropolitan Opera with four hours' notice?
... that when <b id="mwBNg"><a href="./Helena_Braun" id="mwBNk" rel="mw:WikiLink" title="Helena Braun">Helena Braun</a></b> visited New York "just for the trip", she sang the role of Brünnhilde in Wagner's <i id="mwBNo"><a href="./Die_Walküre" id="mwBNs" rel="mw:WikiLink" title="Die Walküre">Die Walküre</a></i> at the <a href="./Metropolitan_Opera" id="mwBNw" rel="mw:WikiLink" title="Metropolitan Opera">Metropolitan Opera</a> with four hours' notice?