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?
Context: Delight of the Muses is a ballet made by New York City Ballet's ballet master in chief Peter Martins to eponymous music by Charles Wuorinen, commissioned by City Ballet as part of its commemoration of the bicentennial of the death of Wolfgang Amadeus Mozart.  The composer has taken fragments of Mozart piano sonatas K.231 and K. 283 and music from "Don Giovanni" for this tribute to Mozart.  The premiere took place on 29 January 1992 at the New York State Theater, Lincoln Center. Darci Kistler (born June 4, 1964) is a noted American ballerina.  She is often said to be the last muse for the choreographer, George Balanchine. Octet is a ballet made by New York City Ballet balletmaster in chief Peter Martins to Mendelssohn's Octet in E-flat major (1825).  The premiere took place November 14, 2003 at the Royal Danish Ballet, Copenhagen; the NYCB premiere was November 23, 2004, at the New York State Theater, Lincoln Center. Swan Lake is a two-act ballet made by New York City Ballet (NYCB) ballet master in chief Peter Martins (after Marius Petipa, Lev Ivanov, and George Balanchine) to Tschaikovsky's eponymous music (1875–56).  The premiere took place 27 October 1996, with the Royal Danish Ballet at the Royal Theatre, Copenhagen; the NYCB premiere was 29 April 1999 at the New York State Theater, Lincoln Center.  Peter Martins' wife, NYCB principal dancer Darci Kistler, chose to include the final act of "Swan Lake" in her farewell performance, Sunday, 27 June. The Chairman Dances is a ballet made by New York City Ballet ballet master in chief Peter Martins to John Adams' eponymous music from 1985.  The music was originally written for Adams' opera, "Nixon in China", but not used in production: the scene is that in which Mao Zedong dances with his future bride, movie star Chiang Ch'ing.  The premiere took place on 14 May 1988, as part of City Ballet's American Music Festival at New York State Theater, Lincoln Center, with scenery and costumes by Rouben Ter-Arutunian, and lighting by Mark Stanley. X–Ray is a ballet made by New York City Ballet balletmaster in chief Peter Martins to John Adams' 1994 "Violin Concerto", commissioned jointly by the Minnesota Orchestra and City Ballet.  The ballet premiere took place Tuesday, November 22, 1994, at the New York State Theater, Lincoln Center; since June 1995 it has been performed as the third movement of Martins' "Adams Violin Concerto" ballet. The ballet premiere was part of a special Salute to Italy, which also included the premiere of "Variations from Don Sebastian", called the "Donizetti Variations" since 1961, and performances of Balanchine's "La Sonnambula" and Lew Christensen's "Con Amore".  It was first performed in conjunction with "Movements for Piano and Orchestra" in 1965, and this practice has been followed almost consistently since 1966, with the same leading female dancer in both in most performances.  The ballet has three parts, each of just over two minutes duration.  NYCB principal dancer Darci Kistler chose to include "Monumentum pro Gesualdo" in her farewell performance, Sunday, June 27. Black and White is a ballet made by New York City Ballet ballet master, subsequently ballet master in chief, Peter Martins to some of Michael Torke's eponymous music which was commissioned for City Ballet's American Music Festival; the premiere took place on 7 May 1988 at the New York State Theater, Lincoln Center.  "Black and White" was the second in a series of collaborations between the choreographer and composer. Hallelujah Junction is the eighth ballet made by New York City Ballet ballet master in chief Peter Martins to John Adams' eponymous music.  The duo pianists appear in silhouette above the dancers throughout in Mark Stanley's lighting.  The dance was made on the Royal Danish Ballet; the premiere took place on 24 March 2001 at the Royal Danish Theatre, Copenhagen.  The NYCB premiere was on 22 January 2002 at the New York State Theater, Lincoln Center. Symphony No. 1 is a ballet made by New York City Ballet ballet master (subsequently ballet master in chief) Peter Martins to Tschaikovsky's "Symphony No. 1 in G minor", Op. 13, "Winter Dreams" (1866–74).  The premiere took place 6 June 1981, as part of City Ballet's Tschaikovsky Festival at the New York State Theater, Lincoln Center.
Answer: Swan Lake