Duo Concertant
... that choreographer George Balanchine did not tell the dancers in Duo Concertant there would be a blackout in the middle of the ballet until the morning of the premiere?
... that choreographer <a href="./George_Balanchine" id="mwAUc" rel="mw:WikiLink" title="George Balanchine">George Balanchine</a> did not tell the dancers in <i id="mwAUg"><b id="mwAUk"><a href="./Duo_Concertant_(ballet)" id="mwAUo" rel="mw:WikiLink" title="Duo Concertant (ballet)">Duo Concertant</a></b></i> there would be a blackout in the middle of the ballet until the morning of the premiere?