Swan Lake (Russian: Лебединое озеро /"Lebedinoye ozero"), Op.
 20, is a ballet composed by Pyotr Ilyich Tchaikovsky in 1875–76.
 Despite its initial failure, it is now one of the most popular of all ballets.
Brenda Vélez (born March 23, 1979) is a Mexican Ballerina and Architect.
 She is best known for performing in Swan Lake and in Giselle in Guadalajara's Teatro Degollado and owning VIA DANZA a dance academy in Guadalajara.
Max A. Rabinoff (March 9, 1877 – April 19, 1966) was a Russian-born, naturalized American opera and ballet impresario and international economic adviser.
 By the time he had become a naturalized U.S. citizen in 1898 he had already started an international import-export company focusing on encouraging American-Russian commerce.
 By 1908 he had entered the world of performing arts promotion, helping to organize the Chicago Philharmonic Orchestra and the Chicago Opera Company.
 He is best known for founding the Boston Grand Opera Company in 1914, where he introduced American audiences to Russian ballerina Anna Pavlova and her Russian Ballet Company during his time as managing director from 1914-1917.
 He also discovered, and soon married, singer Marie La Salle, who died less than two years after their marriage.
Özge Ulusoy (born October 28, 1982, Ankara) is a Turkish model, retired ballet dancer (who holds the prima ballerina assoluta title given by l'École supérieure de ballet ), and occasional film actress from Izmir.
 She is best known for her appearance in the popular TV-series "Arka Sokaklar" from 2006 to 2009.
 As a model, she walked the runways for Hussein Chalayan, Mavi Jeans, Mudo, Hervé Léger, Balenciaga, Eva Gronbach, Guy Laroche, Emanuel Ungaro, Christian Dior, Marks & Spencer, Harvey Nichols, Mango, etc.
 She held the first runner-up title for the annual beauty pageant Miss Turkey in 2003.
 In 2002, Ulusoy finished third in Elite Model Management's Elite Model Look competition, took second place the following year in the Miss Turkey competition, and won the Miss Turkey Universe 2003 title before signing with Uğurkan Erez Model Management in Istanbul.
 Since her debut, Ulusoy has been the face of a variety of advertising campaigns in Turkey.
Antonietta Dell'Era (16 February 1861 Milan 22 June 1945 Berlin) was an Italian "prima ballerina" best known for originating the role of the Sugar Plum Fairy in Tchaikovsky's ballet, "The Nutcracker" (1892).
 The St. Petersberg premiere sold out.
 She received five curtain calls and good reviews.
 Modest Tchaikovsky described her as "pudgy and unattractive".
 From 1879 until 1909, Dell'Era had a successful career at the Berlin Opera, being adored by many critics and writers, among them Theodor Fontane.
 Between 1886 and 1894, she also performed in Russia, mainly in St. Petersberg, along with the "Italian Invasion" - an influx of talented Italian dancers to Russia that included Pierina Legnani, Enrico Cecchetti, and Virginia Zucchi.
Valentina Kozlova (born August 26, 1957) is a Soviet-born Russian American ballerina and founder of Valentina Kozlova International Ballet Competition.
 In 1979, while on tour as a young principal dancer with the Bolshoi Ballet, Kozlova defected to the United States, where she became a principal dancer with New York City Ballet and later, opened her own ballet school.
 Perhaps best known as a lyrical and expressive ballerina, Kozlova is also renowned as a private coach, producing students who have gone on to garner prestigious prizes and positions in companies such as Boston Ballet, American Ballet Theatre Washington Ballet, Stuttgarter Ballet, Les Ballets Trocadéro de Monte Carlo, Universal Ballet, and the National Ballet of Cuba.
The Piano Concerto No. 1 in B-flat minor, Op.
 23, was composed by Pyotr Ilyich Tchaikovsky between November 1874 and February 1875.
 It was revised in the summer of 1879 and again in December 1888.
 The first version received heavy criticism from Nikolai Rubinstein, Tchaikovsky's desired pianist.
 Rubinstein later repudiated his previous accusations and became a fervent champion of the work.
 It is one of the most popular of Tchaikovsky's compositions and among the best known of all piano concertos.
Julia Farron OBE (born 22 July 1922) is a retired English ballerina, best known as one of the earliest and all-time youngest members of The Royal Ballet, the leading ballet company based at the Royal Opera House in Covent Garden, London.
Juliet Rose Landau (born March 30, 1965) is an American actress, director, producer and ballerina best known for her role as Drusilla on "Buffy the Vampire Slayer" and its spinoff show "Angel", the latter appearance earning her a Saturn Award nomination.
 She is also known for co-starring as Loretta King in Tim Burton's "Ed Wood.
Sandra Madgwick Crossley (born in 1963) is a retired English ballerina and former principal dancer at the Birmingham Royal Ballet, where she worked for 19 years.
 She initially trained at the Royal Ballet School and took over extensive roles both at the Birmingham Royal Ballet and at the Royal Opera House, Covent Garden appearing in works such as The Nutcracker, The Two Pigeons, Coppélia, Les Patineurs, and Carmina Burana.
 She is well known for the role of Clara in the recorded and live-aired performance of 'The Nutcracker' in 1994.
 Her other recorded works include the studio-recorded performance of Hobson's Choice (1992), in which she starred as Hobson's daughter Vicky.
 She holds a master's degree in Dance in Education and the Community and is currently ballet tutor at Performers College and Dance East.
 She is married and has three sons.

Question: What is the second profession of the Mexican ballerina best known for the Tchaikovsky ballet that initially failed?
Answer: Architect