Question: Which Ukrainian-born American ballet dancer is remembered for his long association with a musical based on Lynn Riggs' 1931 play, "Green Grow the Lilacs"?

Context paragraphs:
Magali Messac: Magali Messac, a European/American ballet dancer, was born and raised in the south of France, where she received her early training from Olga and Henry Taneeff.  In 1969, the age of seventeen, she joined the Hamburg Ballet, and four years later, was promoted to principal dancer.  That year, she received the Oberdorfer Culture Award for the most talented young artist.  In 1978, she came to the United States as a principal dancer for the Pennsylvania Ballet, and in 1980, was invited by Mikhail Baryshnikov to join American Ballet Theatre as one of their principal ballerinas.  Ms. Messac finished her performing career in Seattle with the Pacific Northwest Ballet.

Michele Wiles: Michele Wiles is an American ballet dancer.  She was a principal dancer with American Ballet Theatre from 2005 - 2011.  In 2011, she left ABT to form the independent classical ballet company Ballet Next with former New York City Ballet principal dancer Charles Askegard.

Marina Eglevsky: Marina Eglevsky is an American ballet dancer born in New York City.  She is the daughter of ballet star Andre Eglevsky and ballerina Leda Anchutina Eglevsky.  Marina studied at the School of American Ballet and the American Ballet Theatre School.  Marina performed professionally in New York City Ballet's production of "The Nutcracker," with the Eglevsky Ballet Company, and as a guest in various companies and engagements.

Oklahoma!: Oklahoma!  is the first musical written by the team of composer Richard Rodgers and librettist Oscar Hammerstein II.  The musical is based on Lynn Riggs' 1931 play, "Green Grow the Lilacs".  Set in Oklahoma Territory outside the town of Claremore in 1906, it tells the story of cowboy Curly McLain and his romance with farm girl Laurey Williams.  A secondary romance concerns cowboy Will Parker and his flirtatious fiancée, Ado Annie.

The Strawberry Roan (song): "The Strawberry Roan" is a classic American cowboy song, written by California cowboy Curley Fletcher (1892–1954), and first published in 1915, as a poem called "The Outlaw Broncho".  By the early 1930s, the song had become famous; in 1931 it was sung by a cowboy in the Broadway play "Green Grow the Lilacs".  It has become one of the best-known cowboy songs, being found in dozens of collections of American folk music and performed on numerous recordings.  Members of the Western Writers of America chose it as one of the Top 100 Western songs of all time.

Green Grow the Lilacs: Green Grow the Lilacs is a folk song of Irish origin that was popular in the United States during the mid-19th century.

Vladimir Kostenko: Vladimir Kostenko (Ukrainian, Володимир Костенко, Russian, Владимир Костенко) (June 11, 1903 – November 7, 1967) was a Ukrainian-born American ballet dancer primarily remembered for his long association with the Rodgers and Hammerstein musical "Oklahoma! ".

Drue Leyton: Drue Leyton (12 July 1903 - 8 February 1997) was an American actress and member of the French resistance.  She was born Dorothy Elizabeth Blackman in Somers, Wisconsin.  She became an actress after a failed mariage and notably acted in Green Grow the Lilacs on Broadway and several Charlie Chan films.  In 1937 Leyton moved to Paris with her future husband a Franco-American actor who died in Syria in 1941 fighting with the Free French forces.

Debra Austin (dancer): Debra Austin (born July 25, 1955) is an American ballet dancer who rose to prominence in 1982 as the first African-American female principal dancer of a major American ballet company.  She was also the first African-American female dancer at the New York City Ballet.  She currently serves as the ballet mistress for the Carolina Ballet.

Green Grow the Lilacs (play): Green Grow the Lilacs is a 1930 play by Lynn Riggs named for the popular folk song of the same name.  It was performed 64 times on Broadway, opening on January 26, 1931, and closing March 21, 1931.  It also played January 19–24, 1931, at the National Theatre in Washington, D.C. The play is the basis of the 1943 musical "Oklahoma! ".

Supporting paragraphs: Vladimir Kostenko Oklahoma!
Answer: Vladimir Kostenko