Question: Where is the theatre located where Olesya Novikova is a first soloist ballet dancer?

Context paragraphs:
Melissa Hamilton: Melissa Hamilton (born August 1989) is a Northern Irish ballet dancer.  From 2015 she was a First Soloist with the Royal Ballet, London.

Olesya Novikova: Olesya Novikova (Russian: Олеся Новикова ) is a Russian ballet dancer who has been first soloist with the Mariinsky Theatre.

César Morales (dancer): César Morales Anderson (born 17 November 1978) is a Chilean ballet dancer who, as of February 2014, is a principal dancer with the Birmingham Royal Ballet.  Born in Rancagua, Chile, César Morales began dancing at the age of eleven at the Ballet School of the Municipal Theatre of Santiago, where he trained for three years before being offered a scholarship by Ben Stevenson to train at the academy of Houston Ballet.  He returned to Santiago at the age of fifteen to complete his training and Ivan Nagy offered him a contract to join the Ballet de Santiago.  After a year in the Corps de Ballet, he was promoted to soloist and a year later to principal dancer immediately after his first performance of "Swan Lake".  Morales danced with the Ballet de Santiago until 2003, when he moved to Paris to work as a freelance guest artist, dancing in Paris, Slovenia and the Czech Republic.  He went on to join the English National Ballet in 2004, was Principal Guest Artist with Vienna Staatsoper in 2006 and then joined the Birmingham Royal Ballet in 2008.

Mariinsky Theatre: The Mariinsky Theatre (Russian: Мариинский театр , Mariinskiy Teatr, also spelled Maryinsky or Mariyinsky) is a historic theatre of opera and ballet in Saint Petersburg, Russia.  Opened in 1860, it became the preeminent music theatre of late 19th century Russia, where many of the stage masterpieces of Tchaikovsky, Mussorgsky, and Rimsky-Korsakov received their premieres.  Through most of the Soviet era, it was known as the Kirov Theatre.  Today, the Mariinsky Theatre is home to the Mariinsky Ballet, Mariinsky Opera and Mariinsky Orchestra.  Since Yuri Temirkanov's retirement in 1988, the conductor Valery Gergiev has served as the theatre's general director.

Xiomara Reyes: Xiomara Reyes is a former principal dancer with American Ballet Theatre.  Born in Cuba, Reyes trained at the Cuban National Ballet School.  After graduation, she danced as a soloist with "La Joven Guardia", an offshoot of Cuba's National Ballet.  After two years, she was invited to perform with the Royal Ballet of Flanders in Belgium and danced with that company for seven years, rising to the rank of first soloist.

Attilio Labis: Attilio Labis (born 1936) is a French ballet dancer and teacher.  He began his training at the Opéra de Paris when he was nine years old and rose through the ranks of the school.  In 1952 he was accepted into the corps de ballet Paris Opera Ballet, but in 1958 he had to join the military.  Upon the completion his military service, he came back and successfully auditioned for a "Premier Danseur" (First soloist) position after only one week of training.  He was promoted to "Danseur Étoile" (principal dancer) approximately one year later, after André Malraux saw him dance "Pas de Dieux", a choreography by Gene Kelly, and recommended he be promoted.  He performed as a "Danseur Étoile" (principal dancer) in the Paris Opera Ballet from 1960 to 1972, then taught the company as a ballet teacher until his retirement<br>

Mira Redina: Mira Evgenyevna Redina (Russian: Мира Евгеньевна Редина ; February 8, 1926 - August 2011) was a ballet dancer, in the years 1944-1965 - soloist of the Stanislavski and Nemirovich-Danchenko Moscow Academic Music Theatre.  Starred in the movie "Soloist Ballet" (1947).  Honored Artist of the RSFSR (1957).

Vladimir Yaroshenko: Vladimir Yaroshenko (Russian: Владимир Ярошенко; born November 2, 1985 in Slavyansk-na-Kubani) – Polish-Russian ballet dancer, first soloist with Yury Grigorovich’s Ballet Theatre, Krasnodar, trained in classical Russian ballet school.  Polish resident since 2007, engaged with Teatr Wielki, Warsaw, where since September 2010 is a first soloist of Polish National Ballet under direction of Krzysztof Pastor.

Hannah O'Neill: Hannah O'Neill, born in January 1993 in Tokyo, is a New Zealand ballet dancer.  She is a first soloist with the Paris Opera Ballet which is regarded as one of the best ballet companies in the world.

Momoko Hirata: Momoko Hirata (平田 桃子 , Hirata Momoko , born 1985) is a Japanese principal dancer for the Birmingham Royal Ballet.  She attended the Reiko Yamamoto Ballet School before enrolling in the Royal Ballet School in the London, England.  She won the 2001 Prix de Lausanne and joined the Birmingham Royal Ballet in 2003.  She was promoted to First Artist in 2005, Soloist in 2008, and First Soloist in 2010.  She briefly danced with the Barcelona Ballet as a principal dancer in 2012, before returning to the Birmingham Royal Ballet where she was promoted to Principal in 2013.

Supporting paragraphs: Olesya Novikova Mariinsky Theatre
Answer: Saint Petersburg, Russia