Anne Bierwirth
... that Anne Bierwirth has performed the alto part in Bach's Christmas Oratorio, and in a recording of the first Passion oratorio in German by Reinhard Keiser?
... that <b id="mwBDU"><a href="./Anne_Bierwirth" id="mwBDY" rel="mw:WikiLink" title="Anne Bierwirth">Anne Bierwirth</a></b> has performed the <a href="./Alto" id="mwBDc" rel="mw:WikiLink" title="Alto">alto</a> part in Bach's <i id="mwBDg"><a href="./Christmas_Oratorio" id="mwBDk" rel="mw:WikiLink" title="Christmas Oratorio">Christmas Oratorio</a></i>, and in a recording of the first <a href="./Passion_(music)#Protestant_music" id="mwBDo" rel="mw:WikiLink" title="Passion (music)">Passion oratorio</a> in German by <a href="./Reinhard_Keiser" id="mwBDs" rel="mw:WikiLink" title="Reinhard Keiser">Reinhard Keiser</a>?