"Sky Stays This Blue" is a song written by Ross Copperman, Ashley Gorley, and Josh Osborne and recorded by Canadian country singer Dallas Smith for his third studio album, "Side Effects" (2016).
 It was released to Canadian country radio May 16, 2017 through 604 Records as the album's fifth single.
 An accompanying video featuring Smith's daughter premiered on Father's Day 2017.
Semey (Kazakh and Russian: Семей ), until 2007 known as Semipalatinsk (Kazakh and Russian: Семипалатинск ) and in 1917–1920 as Alash-kala (, "Alaş-qala"), is a city in Kazakhstan, in East Kazakhstan Region, and in the Kazakhstan part of Siberia, near the border with Russia, around 1000 km north of Almaty, and 700 km southeast of the Russian city of Omsk, along the Irtysh River.
 Population: (2009 Census results); (1999 Census results)
Nashe Radio (Russian: Наше Радио , "Our Radio", pronounced "nush-eh") is a Russian Rock music radio station.
 It was designed to promote Russian rock bands, as opposed to pop and Western music.
 Nashe is based in Moscow and broadcast in every major Russian city as well as through the internet stream.
 It was founded in 1998 by former Radio Maximum producer Mikhail Kozyrev.
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.
Russian submarine "K-336 Pskov" Russian: "Псков" ) is a "Sierra"-class attack submarine of the Russian Navy.
 She is named after the Russian city Pskov.
The Vorkuta State Drama Theatre (Russian: Воркутинский государственный драматический театр ) is located in the Russian city Vorkuta.
 It was opened in 1943 in the Gulag.
The opera was premiered on 14 February 1911 (Old Style) at the Mariinsky Theatre in Saint Petersburg under the conductorship of Eduard Nápravník.
 Its Moscow premiere took place on 17 September 1914 at the Solodovnikov Theater, with S.I. Zimin's Opera Company.
Mars (Russian: Марс ) is a 2004 Russian film, directed and written by Anna Melikian.
 Set in a small Russian city of Mars, the film tells the story of a professional boxer who has run away from his life to a small Russian town on the coast of the Black Sea.
The area of the Russian city of Sochi was populated more than 100,000 years by ancient people of Asia Minor migrating through Colchis (olden Georgia).
 Ancient Greeks sailed to the region via the Black Sea in the 5th–6th centuries BC and encountered the Maeotae, Sindi, Cercetae, Zygii and other local tribes.
 They were the ancestors of the Abkhaz, Ubykh and Adyghe people who lived here until 1864; many toponyms in Sochi, including the city itself, originate from their languages.
 The first Russian outpost was set up in central Sochi in 1838 as a part of the Russian expansion along the Black Sea coast.
 The local resistance to this process resulted in the Caucasian War of 1817–1864, which ended in a Russian victory and the expulsion of the local population, mostly to Turkey.
 The Russian settlement built in the area was named Sochi in 1896 and received the status of a city (town) in 1917.
 The first tea plantations were established there in 1901–1905 and resulted in the production of the most prominent brand of Russian tea.
 From the end of the 19th century, the city has been developed as a dedicated area for sanatoriums and hospitals.
 It served as a rehabilitation center during World War II and, despite a decline following the dissolution of the Soviet Union, remains the major resort town of Russia.
 An important recent event was selection of Sochi as the site of the 2014 Winter Olympics and 2014 Winter Paralympics.
Immanuel Kant Baltic Federal University (Russian: Балтийский федеральный университет имени Иммануила Канта ) formerly known as the "Immanuel Kant Russian State University" (Russian: Российский государственный университет имени Иммануила Канта , "Rossiyskiy gosudarstvennyy universitet imeni Immanuila Kanta"), or in brief the "Kant University" (Russian: Университет Канта , "Universitet Kanta") and as Kaliningrad State University (1967-2005), is a university in the Russian city of Kaliningrad (formerly Königsberg).

Question: The Captain's Daughter premiered at the theatre in what Russian city?
Answer: Saint Petersburg