Question: For which ballet was this Soviet ballet dancer and choreographer, who portrayed the main character in the film Valentino, a director?
Context: Aleksey Nikolayevich Yermolayev (Russian: Алексе́й Никола́евич Ермола́ев; 23 February [O.S. 10 February] 1910 12 December 1975) was a Soviet ballet dancer, choreographer, and teacher.  He played an important role in the development of Russian ballet between 1950 and 1975, and he was considered an outstanding actor. Nicholas Efimov was a Soviet Ballet dancer who trained at the Theater School in St. Petersburg and the Maryinsky Ballet.  During a 1924 tour in Western Europe, Efimov defected along with dancers Alexandra Danilova, choreographer George Balanchine and his wife.  He fled to France where he danced with the Ballet Russes and subsequently became a premier dancer with the Paris Opera Ballet. Van Le Ngoc (Lê Ngọc Vǎn) is a ballet dancer and a choreographer.  Born in Hanoi, Vietnam, he moved to live and study in France in 1996.  From 1996 to 1998, he followed his study to become a ballet dancer at National Superior Conservatory of Music and Dance in Lyon (CNSM).  In September 1998, Van signed his first contract with the Ballet National de Marseille, under the direction of Marie-Claude Pietragalla, Etoile of the Paris Opera Ballet.  Five years later in 2003, he left Ballet National de Marseille to join the English National Ballet in London. Johanne Emilie Margrethe Walbom née Egense (1858–1932) was a Danish ballet dancer and choreographer.  During her exceptionally long term of 61 years with the Royal Danish Ballet, she progressed from ballet dancer to the company's first female choreographer in 1878.  In 1915, she became its first "ballet mistress", albeit under the ballet master Gustav Uhlendorff. Johan Kobborg (born 5 June 1972) is a Danish ballet dancer, choreographer, director and visual artist.  He is most noted as a ballet dancer, having been a principal dancer with both the Royal Danish Ballet and the Royal Ballet in London, as well as making guest appearances with other ballet companies.  Following his departure from the Royal Ballet in 2013, he became the director of the Romanian National Ballet Company. Rudolf Khametovich Nureyev (Bashkir: Рудольф Хәмит улы Нуриев , Tatar: Рудольф Хәмит улы Нуриев , Russian: Рудо́льф Хаме́тович Нуре́ев ; 17 March 1938 – 6 January 1993) was a Soviet ballet dancer and choreographer.  He was director of the Paris Opera Ballet from 1983 to 1989 and its chief choreographer until October 1992. Val Caniparoli is an American ballet dancer and choreographer.  His work includes productions for ballet, opera, and theater for over 35 companies, and his career as a choreographer progressed even as he continued his professional dance career with the San Francisco Ballet.  He joined the San Francisco Ballet as a dancer in 1973.  He was appointed to the position of principal character dancer with the San Francisco Ballet by Artistic Director Helgi Tomasson in 1987. Asaf Mikhailovich Messerer (Russian: Асаф Михайлович Мессерер, November 19, 1903 - March 7, 1992) was a Lithuanian Jewish and Soviet ballet dancer and ballet teacher.  He was born in Vilnius, Lithuania.  From 1919 until 1921 he trained as a dancer at the Bolshoi Ballet School under Mikhail Mordkin.  He then joined the Bolshoi Theatre, where he became a successful soloist, eventually becoming their chief soloist, a post he retired from in 1954. Valentino is a 1977 American biographical film directed by Ken Russell and starring Rudolf Nureyev as Rudolph Valentino.  The film is very loosely based on the life of Valentino as recounted in the book "Valentino, an Intimate Exposé of the Sheik", written by Chaw Mank and Brad Steiger.  The film also stars Michelle Phillips, Leslie Caron, and Carol Kane. Francesco Ventriglia (born 9 June 1978) is an Italian ballet dancer, choreographer and artistic director.  He was, most recently, the Artistic Director of the Royal New Zealand Ballet from November 2014 until June 2017.  Ventriglia is also a choreographer of classical and contemporary Ballet, having works performed internationally by companies such as the Royal New Zealand Ballet, La Scala Ballet, Bolshoi Theatre, the Mariinsky Ballet.
Answer: Paris Opera Ballet