Margarethe Siems
... that between 1909 and 1912, soprano Margarethe Siems sang leading roles in the world premieres of three operas by Richard Strauss—Elektra, Der Rosenkavalier and Ariadne auf Naxos?
... that between 1909 and 1912, <a href="./Soprano" id="mwVQ" rel="mw:WikiLink" title="Soprano">soprano</a> <b id="mwVg"><a href="./Margarethe_Siems" id="mwVw" rel="mw:WikiLink" title="Margarethe Siems">Margarethe Siems</a></b> <i id="mwWA">(pictured)</i> sang leading roles in the world premieres of three operas by <a href="./Richard_Strauss" id="mwWQ" rel="mw:WikiLink" title="Richard Strauss">Richard Strauss</a><span id="mwWg" typeof="mw:Entity">—</span><i id="mwWw"><a href="./Elektra_(opera)" id="mwXA" rel="mw:WikiLink" title="Elektra (opera)">Elektra</a></i>, <i id="mwXQ"><a href="./Der_Rosenkavalier" id="mwXg" rel="mw:WikiLink" title="Der Rosenkavalier">Der Rosenkavalier</a></i> and <i id="mwXw"><a href="./Ariadne_auf_Naxos" id="mwYA" rel="mw:WikiLink" title="Ariadne auf Naxos">Ariadne auf Naxos</a></i>?