Question: Which major Russian city borders the sea containing the islets of Bogskär?

full_context: Document 1: 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 2: List of archipelagos by number of islands: Location (total number of islands) Name of the archipelagos Number of islands, islets, reefs, coral reefs and cays Norway Norwegian Archipelago 240,000 Finland Archipelago Sea 40,000 (approx.) Canada Canadian Arctic Archipelago 36,563 Canada Thirty Thousand Islands 30,000 (approx.) Stockholm archipelago, Sweden (34,316) Stockholm archipelago 28,945 Södermanland archipelago, Sweden Södermanland archipelago 5,371 Indonesia Indonesian Archipelago 17,508 -- 18,306 Philippines Philippine Archipelago 7,641 Swedish East Coast Archipelago (21,628) Småland archipelago 12,740 Östergötland archipelago 8,888 Sweden Öregrund archipelago 9,722 The Bahamas 3,200 Bahama Archipelago 3,200 Japanese archipelago 6,852 Seto Inland Sea 3,000 Finland Kvarken Archipelago 6,500 British Isles British Isles 6,289 China (5,000) Zhoushan Archipelago 1,390 (islands) Korea Korean Peninsula 3,579 Queensland, Australia Great Barrier Reef 2,900 (reefs), 900 (islands) Chile Chile 2,324 Quảng Ninh Province, Vietnam Ha Long Bay 1,960 -- 2,000 Saint Lawrence River, Canada -- United States border Thousand Islands 1,864 Thailand Thailand 1,430 India Andaman and Nicobar Islands, Lakshadweep Islands, Coastal India 1208 Greece Aegean Sea 1,200 -- 6,000 Croatia Dalmatia 1,200 Maldives Maldive Islands 1,192 (coral islands) Estonia West Estonian archipelago 900 Italy Italy 800 Falkland Islands Falkland Islands 776 New Zealand New Zealand Archipelago 600 Turkey Aegean Sea, Marmara Sea, Black Sea 500 (approx.)
Document 3: 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 4: Bogskär: Bogskär is a small group of Baltic Sea islets off the southernmost tip of Finland. It is Finland's southernmost land and governed by the municipality of Kökar in Åland. The islets are remote: the distance to the nearest large islands in Kökar, Föglö and Lemland is over .
Document 5: 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 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: Fährinsel: Fährinsel is a small Baltic Sea island off the eastern shore of the island of Hiddensee and which belongs to the Insel Hiddensee municipality. It is separated from Hiddensee by the narrow "Bäk", only 120 metres wide in places. It forms the western part of the border between the Schaproder Bodden and the Vitter Bodden. The island is 1.23 km long and up to 580 metres wide. It has an area of ca. 37 ha. Ferry services between Rügen and Hiddensee used to run via Fährinsel. It was closed in 1952 when the port at Schaprode was upgraded to handle mailboat services. Fährinsel is a nature reserve and out-of-bounds to visitors. It is a roosting place for thousands of birds and the grazing area for a herd of Gotland sheep.
Document 8: Gedser Odde: Gedser Odde on the island of Falster in the Baltic Sea is Denmark's southernmost point. The terminal moraine from Idestrup through Skelby to Gedser is part of the maximum glaciation line across Falster, from Orehoved to Gedser. Fronted by low cliffs, the ridge, high, continues underwater a further south-east to Gedser Rev. Sydstenen (the south stone) marks the southernmost point.
Document 9: League of Nations: Åland is a collection of around 6,500 islands in the Baltic Sea, midway between Sweden and Finland. The islands are almost exclusively Swedish-speaking, but in 1809, the Åland Islands, along with Finland, were taken by Imperial Russia. In December 1917, during the turmoil of the Russian October Revolution, Finland declared its independence, but most of the Ålanders wished to rejoin Sweden. The Finnish government considered the islands to be a part of their new nation, as the Russians had included Åland in the Grand Duchy of Finland, formed in 1809. By 1920, the dispute had escalated to the point that there was danger of war. The British government referred the problem to the League's Council, but Finland would not let the League intervene, as they considered it an internal matter. The League created a small panel to decide if it should investigate the matter and, with an affirmative response, a neutral commission was created. In June 1921, the League announced its decision: the islands were to remain a part of Finland, but with guaranteed protection of the islanders, including demilitarisation. With Sweden's reluctant agreement, this became the first European international agreement concluded directly through the League.
Document 10: Savage Islands: The archipelago includes two major islands and several islets of varying sizes, in two areas: Selvagem Grande and Selvagem Pequena. The archipelago is administered by the Portuguese municipality of Funchal, belongs to the Madeiran civil parish of Sé, and is the southernmost point of Portugal.
Document 11: 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 12: 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 13: Lågskär Lighthouse: Lågskär Lighthouse is an automated lighthouse located on the north side of Lågskär, one of Finland's Åland Islands in the Sea of Åland of the Baltic. It is the only striking feature on Lågskär on the generally uninhabited island.
Document 14: 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 15: 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.
ground_truth: Saint Petersburg
sub_queries: Bogskär >> located on terrain feature Answer: Baltic Sea
which major russian city borders Baltic Sea Answer: Saint Petersburg