Question: Mariinsky Theatre Second Stage has hosted which Russian operatic soprano?
Context: Stanislav Leontiev (Russian: Станислав Леонтьев ) is a Russian operatic tenor who was born in Leningrad.  He graduated from the Glinka Choral School of the Academic Capella and Rimsky-Korsakov Conservatory in 1995 and 2000 respectively.  Prior to joining with Mariinsky Theatre in 2010, he used to be the Zazerkalie Theatre soloist. Anna Yuryevna Netrebko (Russian: Анна Юрьевна Нетребко , born 18 September 1971) is a Russian operatic soprano.  She now holds dual Russian and Austrian citizenship and currently resides in Vienna, Austria, and in New York City. The Mariinsky Theater Second Stage is the second part of a theatre complex which is made up of the original 1860 Mariinsky Theatre and the 2007 Mariinsky Theatre Concert Hall.  The Second Stage has been completed and a gala concert celebrating the opening, and featuring such luminaries as Plácido Domingo, Rene Pape, Anna Netrebko, and many others, was presented on 2 May 2013.  The concert also celebrated the sixtieth birthday of musical director Valery Gergiev. Aida Garifullina (born 30 September 1987) is a Russian operatic soprano of Tatar origin.  She was the winner of the 2013 Operalia competition and has featured in a number of productions staged at the Mariinsky Theatre, St. Petersburg and the Wiener Staatsoper.  She has a recording contract with Decca Records. Olga Peretyatko (Russian: Ольга Перетятько ; born 21 May 1980 in Leningrad, now Saint Petersburg) is a Russian operatic soprano.  As a child Peretyatko sang in the children's choir of the Mariinsky Theatre.  As a student of the Hamburg Opera Studio she received the second prize at Operalia Competition (2007), an event sponsored by tenor Plácido Domingo. Viktoria Yastrebova (Russian: Виктория Ястребова , also known as Victoria Yastrebova) is a Russian operatic soprano.  She is currently a principal of the Mariinsky Theatre in Saint Petersburg, Russia. The Mariinsky Theatre Orchestra or just the Mariinsky Orchestra (formerly known as the Kirov Orchestra) is located in the Mariinsky Theatre in St. Petersburg, Russia.  The orchestra was founded in 1783 during the reign of Catherine the Great, it was known before the revolution as the Russian Imperial Opera Orchestra.  The orchestra is one of the oldest musical institutions in Russia. Ulyana Vyacheslavovna Lopatkina (Russian: Ульяна Вячеславовна Лопаткина ; born 23 October 1973) is a Russian prima ballerina who performed with the Mariinsky Theatre from 1991-2017.  She studied at the Vaganova Academy with Natalia Dudinskaya.  Upon graduation Lopatkina joined the Kirov/Mariinsky Theatre Ballet in 1991, and was promoted to principal dancer in 1995.  Lopatkina was married to Vladimir Kornev, architect and writer (divorced in 2010), and has one daughter (Masha, born 2002).  Lopatkina did not dance during the 2016-2017 season due to injury, and her retirement from the Mariinsky was announced on the company's website on June 16, 2017. Artyom Melikhov is a Russian tenor singer who was born in Saint Petersburg.  He graduated from both the Glinka Choral School and Saint Petersburg Conservatory where he was under guidance from Yelizaveta Kudryavtseva till 2006.  In 2008 under guidance from Valery Gergiev he played a role of one of the Japanese envoys in "Le Rossignol" opera and during the same year played a soloist role in "Chimes" at the Mariinsky Theatre.  In 2009 he had his first appearance with Mariinsky Theatre where he played in an opera called "War and Peace".  That year was followed by such 2010 debuts as the "The Mystery of the Apostle Paul" in which he sang in a role of "Nero" at the Mariinsky Theatre and another "War and Peace" performance, this time at the John F. Kennedy Center for the Performing Arts.  In 2011 he became the Mariinsky Academy of Young Singers soloist and the same year performed the role of "Ovlur" in an opera called "Prince Igor" following by his appearance in "Dead Souls" and "Ariadne auf Naxos".  In May 2013 he was "Rienzi" performer at the Saratov Opera under Alexei Stepanyuk's baton and the same year sang at the Carmina Burana opera after which he went on a tour to Naples where he performed at the Teatro di San Carlo. 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.
Answer: Anna Yuryevna Netrebko