Question: Swan Lake is a two-act ballet made by New York City Ballet (NYCB) ballet master in chief Peter Martins, Martins' wife, NYCB principal dancer Darci Kistler, chose to include the final act of what, in her farewell performance?
Sentence (from "Darci Kistler"): She is often said to be the last muse for the choreographer, George Balanchine.
Relevant evidence: No