Friederike Sailer
... that the soprano Friederike Sailer appeared in the premiere of Werner Egk's Der Revisor at the Schwetzingen Festival, conducted by the composer?
... that the soprano <b id="mwBGQ"><a href="./Friederike_Sailer" id="mwBGU" rel="mw:WikiLink" title="Friederike Sailer">Friederike Sailer</a></b> appeared in the premiere of <a href="./Werner_Egk" id="mwBGY" rel="mw:WikiLink" title="Werner Egk">Werner Egk</a>'s <i id="mwBGc">Der Revisor</i> at the <a href="./Schwetzingen_Festival" id="mwBGg" rel="mw:WikiLink" title="Schwetzingen Festival">Schwetzingen Festival</a>, conducted by the composer?