Gwendolyn Killebrew
... that soon after starting her career at the Met, Gwendolyn Killebrew appeared as a valkyrie in Wagner's Die Walküre in a live broadcast alongside Birgit Nilsson in the title role?
... that soon after starting her career at the <a href="./Metropolitan_Opera" id="mwDeQ" rel="mw:WikiLink" title="Metropolitan Opera">Met</a>, <b id="mwDeU"><a href="./Gwendolyn_Killebrew" id="mwDeY" rel="mw:WikiLink" title="Gwendolyn Killebrew">Gwendolyn Killebrew</a></b> appeared as a valkyrie in Wagner's <i id="mwDec"><a href="./Die_Walküre" id="mwDeg" rel="mw:WikiLink" title="Die Walküre">Die Walküre</a></i> in a live broadcast alongside <a href="./Birgit_Nilsson" id="mwDek" rel="mw:WikiLink" title="Birgit Nilsson">Birgit Nilsson</a> in the title role?