Question: Which major Russian city borders the sea where the island of Kihnu is found?

full_context: Document 1: Kirr: Kirr is an island in the Darss-Zingst Bodden Chain south of the Zingst Peninsula on the German Baltic Sea coast. It is separated from the peninsula by the Zingster Strom. The island is a nature reserve within the Western Pomerania Lagoon Area National Park. It was formerly and is sometimes still called Großer Kirr or Große Kirr ("Great Kirr"). This is to distinguish it from the northwestern part of the island, which was still a separate albeit much smaller island in the Zingster Strom in the second half of the 20th century, that used to be called Kleiner Kirr or Kleine Kirr ("Small Kirr").
Document 2: Mährens: The German Baltic Sea island of Mährens is uninhabited and lies between the islands of Rügen and Ummanz off the coast of Mecklenburg-Western Pomerania. It is only around 150 × 100 metres across and up to 3 metres above sea level.
Document 3: Öhe: Öhe is an island in the Baltic Sea off the ferry port of Schaprode on Rügen, itself the largest island in Germany. The island of Öhe lies opposite Schaprode on Rügen between the lagoon of Schaproder Bodden and one of its bays, the Udarser Wiek, and is about 72 hectares in area. There is an individual farmstead on the island which has periodically fallen into disrepair and belongs to a Schilling family, who are probably descended from its owners in the 13th century. In 1990 the farmhouse was restored and is once again inhabited. The highest point on the island is the 3.3 metre high Fuchsberg.
Document 4: Latvia: Latvia ( or ; , ), officially the Republic of Latvia (, ), is a country in the Baltic region of Northern Europe. Since its independence, Latvia has been referred to as one of the Baltic states. It is bordered by Estonia to the north, Lithuania to the south, Russia to the east, and Belarus to the southeast, and shares a maritime border with Sweden to the west. Latvia has 1,957,200 inhabitants and a territory of . The country has a temperate seasonal climate.
Document 5: Poland: Poland is bordered by the Baltic Sea, Lithuania, and Russia's Kaliningrad Oblast to the north, Belarus and Ukraine to the east, Slovakia and the Czech Republic to the south, and Germany to the west.
Document 6: Estonia: Estonia (i/ɛˈstoʊniə/; Estonian: Eesti [ˈeːsti]), officially the Republic of Estonia (Estonian: Eesti Vabariik), is a country in the Baltic region of Northern Europe. It is bordered to the north by the Gulf of Finland, to the west by the Baltic Sea, to the south by Latvia (343 km), and to the east by Lake Peipus and Russia (338.6 km). Across the Baltic Sea lies Sweden in the west and Finland in the north. The territory of Estonia consists of a mainland and 2,222 islands and islets in the Baltic Sea, covering 45,339 km2 (17,505 sq mi) of land, and is influenced by a humid continental climate.
Document 7: Baltic region: The terms Baltic region, Baltic Rim countries (or simply Baltic Rim), and the Baltic Sea countries refer to slightly different combinations of countries in the general area surrounding the Baltic Sea in Northern Europe.
Document 8: Kaliningrad: Kaliningrad (Russian: Калининград, IPA: (kəljɪnjɪnˈɡrat); former German name: Königsberg; Yiddish: קעניגסבערג, Kenigsberg; Russian: Кёнигсберг, tr. Kyonigsberg; Old Prussian: Twangste, Kunnegsgarbs, Knigsberg) is the administrative center of Kaliningrad Oblast, a Russian exclave between Poland and Lithuania on the Baltic Sea.
Document 9: Baltic Sea: Since May 2004, with the accession of the Baltic states and Poland, the Baltic Sea has been almost entirely surrounded by countries of the European Union (EU). The only remaining non-EU shore areas are Russian: the Saint Petersburg area and the exclave of the Kaliningrad Oblast.
Document 10: Belarus: Belarus (; , ), officially the Republic of Belarus (, ), formerly known by its Russian name Byelorussia or Belorussia (), is a landlocked country in Eastern Europe bordered by Russia to the northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Its capital and most populous city is Minsk. Over 40% of its is forested. Its major economic sectors are service industries and manufacturing. Until the 20th century, different states at various times controlled the lands of modern-day Belarus, including the Principality of Polotsk (11th to 14th centuries), the Grand Duchy of Lithuania, the Polish–Lithuanian Commonwealth, and the Russian Empire.
Document 11: British Isles: Ireland and the United Kingdom are both part of the European Union (EU). The Crown Dependencies are not a part of the EU however do participate in certain aspects that were negotiated as a part of the UK's accession to the EU. Neither the United Kingdom or Ireland are part of the Schengen area, that allow passport-free travel between EU members states. However, since the partition of Ireland, an informal free-travel area had existed across the region. In 1997, this area required formal recognition during the course of negotiations for the Amsterdam Treaty of the European Union and is now known as the Common Travel Area.
Document 12: Kihnu: Kihnu () is an island in the Baltic Sea. With an area of it is the largest island in the Gulf of Riga and the seventh largest island of Estonia. The length of the island is and width , the highest point is at above sea level.
Document 13: Estonia: In 2005, Estonia joined the European Union's Nordic Battle Group. It has also shown continued interest in joining the Nordic Council. Whereas in 1992 Russia accounted for 92% of Estonia's international trade, today there is extensive economic interdependence between Estonia and its Nordic neighbours: three quarters of foreign investment in Estonia originates in the Nordic countries (principally Finland and Sweden), to which Estonia sends 42% of its exports (as compared to 6.5% going to Russia, 8.8% to Latvia, and 4.7% to Lithuania). On the other hand, the Estonian political system, its flat rate of income tax, and its non-welfare-state model distinguish it from the Nordic countries and their Nordic model, and indeed from many other European countries.
Document 14: Vilsandi: The island of Vilsandi, Saaremaa Parish, Saare County, Estonia is located in the Baltic Sea. It covers an area of some 9 square km and is the westernmost populated island in Estonia. The surrounding waters are shallow and rocky and many ships travelling the Baltic have perished nearby. The island of Vilsandi can be reached by boat, by truck having suitable clearance or on foot by wading from Saaremaa. Much of the island is now part of Vilsandi National Park, which grew from a bird reserve founded in 1910. It is a highly sensitive ecosystem due to the use of the area by many migratory birds as a breeding and nesting ground. Hunting is absolutely prohibited. This park is a popular tourist destination not only for local Estonians, but also people of Finland who are visiting Estonia in greater and greater numbers.
Document 15: Liebes: The small, uninhabited island of Liebes lies in the Baltic Sea, in the lagoon of Varbelvitzer Bodden between the islands of Rügen and Ummanz. It is a good 1,000 metres long, up to 200 metres wide and its highest point lies just 1.5 metres above sea level. The name of the island could be derived from the Slavic word "Lipa" = "lime tree".
ground_truth: Saint Petersburg
sub_queries: Kihnu >> located on terrain feature Answer: Baltic Sea
which major russian city borders Baltic Sea Answer: Saint Petersburg