Ballo della Regina
... that George Balanchine choreographed Ballo della Regina to showcase ballerina Merrill Ashley's speed and precision?
... that <a href="./George_Balanchine" id="mwBDg" rel="mw:WikiLink" title="George Balanchine">George Balanchine</a> choreographed <i id="mwBDk"><b id="mwBDo"><a href="./Ballo_della_Regina" id="mwBDs" rel="mw:WikiLink" title="Ballo della Regina">Ballo della Regina</a></b></i> to showcase ballerina <a href="./Merrill_Ashley" id="mwBDw" rel="mw:WikiLink" title="Merrill Ashley">Merrill Ashley</a>'s speed and precision?