Assertion: ballet's director | /r/HasProperty | willam christensen
Facets:
Source sentences:
text: The founding artistic director, Willam Christensen, retired in 1978.
text: The ballet's first complete United States performance was on 24 December 1944, by the San Francisco Ballet, staged by its artistic director, Willam Christensen, and starring Gisella Caccialanza as the Sugar Plum Fairy, and Jocelyn Vollmar as the Snow Queen.