Question: When did the country home to SuperSeaCat join the Russian Empire?

full_context: Document 1: Russian language: Ethnic Russians constitute 25.5% of the country's current population and 58.6% of the native Estonian population is also able to speak Russian. In all, 67.8% of Estonia's population can speak Russian. Command of Russian language, however, is rapidly decreasing among younger Estonians (primarily being replaced by the command of English). For example, if 53% of ethnic Estonians between 15 and 19 claim to speak some Russian, then among the 10- to 14-year-old group, command of Russian has fallen to 19% (which is about one-third the percentage of those who claim to have command of English in the same age group).
Document 2: Russian language: In Kazakhstan Russian is not a state language, but according to article 7 of the Constitution of Kazakhstan its usage enjoys equal status to that of the Kazakh language in state and local administration. According to estimates from Demoskop Weekly, in 2004 there were 4,200,000 native speakers of Russian in the country, and 10 million active speakers. 63% of the population was fluent in Russian in 2006, and 46% used it as the main language with family, friends or at work. According to a 2001 estimate from the World Factbook, 95% of the population can speak Russian. Large Russian-speaking communities still exist in northern Kazakhstan, and ethnic Russians comprise 25.6% of Kazakhstan's population. The 2009 census reported that 10,309,500 people, or 84.8% of the population aged 15 and above, could read and write well in Russian, as well as understand the spoken language.
Document 3: Sealink: As demand for international rail travel declined and the shipping business became almost exclusively dependent on passenger and freight vehicle traffic, the ferry business was incorporated as Sealink UK Limited on 1 January 1979, a wholly owned subsidiary of the British Railways Board (BRB), but still part of the Sealink consortium. In 1979, Sealink acquired Manx Line which offered services to the Isle of Man from Heysham.
Document 4: Sealink: Sealink was a ferry company based in the United Kingdom from 1970 to 1984, operating services to France, Belgium, the Netherlands, Channel Islands, Isle of Wight and Ireland.
Document 5: Evergreen Marine: Evergreen Marine Corporation () ( ), is a Taiwanese container transportation and shipping company headquartered in Luzhu District, Taoyuan City, Taiwan. Its principal trading routes are the Far East to North America, Central America and the Caribbean; the Far east to northern Europe and the east Mediterranean; Europe to the east coast of North America; the Far East to Australia, Mauritius, South Africa and South America; and an intra Asia service linking ports in Asia to the Middle East, Persian Gulf and the Red Sea. With over 150 container ships it is part of the Evergreen Group conglomerate of transportation firms and associated companies. Evergreen calls on 240 ports worldwide in about 80 countries, and is the fifth largest company of its type. The company's activities include: shipping, construction of containers and ships, management of ports, and engineering and real estate development. Subsidiaries and divisions include Uniglory Marine Corp. (Taiwan), Evergreen UK Ltd. (UK), and shipping company Italia Marittima S.p.A. (Italy).
Document 6: American Export-Isbrandtsen Lines: American Export-Isbrandtsen Lines, New York, was the leading US-flag shipping company between the U.S. east coast and the Mediterranean from 1919 to 1977, offering both cargo ship services and passenger ship services, until it declared bankruptcy and was acquired by Farrell Lines, New York.
Document 7: Russian language: Significant Russian-speaking groups also exist in Western Europe. These have been fed by several waves of immigrants since the beginning of the 20th century, each with its own flavor of language. The United Kingdom, Spain, Portugal, France, Italy, Belgium, Greece, Brazil, Norway, and Austria have significant Russian-speaking communities. According to the 2011 Census of Ireland, there were 21,639 people in the nation who use Russian as a home language. However, of this only 13% were Russian nationals. 20% held Irish citizenship, while 27% and 14% were holding the passports of Latvia and Lithuania respectively.
Document 8: SuperSeaCat: SuperSeaCat was a shipping company operating fast ferries between Helsinki, Finland and Tallinn, Estonia during the years 2006–2008. It was jointly owned by Sea Containers and the Greece-based Aegean Speed Lines.
Document 9: Russian language: As the Grand Duchy of Finland was part of the Russian Empire from 1809 to 1918, a number of Russian speakers have remained in Finland. There are 33,400 Russian-speaking Finns, amounting to 0.6% of the population. Five thousand (0.1%) of them are late 19th century and 20th century immigrants or their descendants, and the remaining majority are recent immigrants who moved there in the 1990s and later.[citation needed] Russian is spoken by 1.4% of the population of Finland according to a 2014 estimate from the World Factbook.
Document 10: Russian language: According to figures published in 2006 in the journal "Demoskop Weekly" research deputy director of Research Center for Sociological Research of the Ministry of Education and Science (Russia) Arefyev A. L., the Russian language is gradually losing its position in the world in general, and in Russia in particular. In 2012, A. L. Arefyev published a new study "Russian language at the turn of the 20th-21st centuries", in which he confirmed his conclusion about the trend of further weakening of the Russian language in all regions of the world (findings published in 2013 in the journal "Demoskop Weekly"). In the countries of the former Soviet Union the Russian language is gradually being replaced by local languages. Currently the number speakers of Russian language in the world depends on the number of Russians in the world (as the main sources distribution Russian language) and total population Russia (where Russian is an official language).
Document 11: Russian language: The language was first introduced in North America when Russian explorers voyaged into Alaska and claimed it for Russia during the 1700s. Although most colonists left after the United States bought the land in 1867, a handful stayed and preserved the Russian language in this region to this day, although only a few elderly speakers of this unique dialect are left. Sizable Russian-speaking communities also exist in North America, especially in large urban centers of the U.S. and Canada, such as New York City, Philadelphia, Boston, Los Angeles, Nashville, San Francisco, Seattle, Spokane, Toronto, Baltimore, Miami, Chicago, Denver and Cleveland. In a number of locations they issue their own newspapers, and live in ethnic enclaves (especially the generation of immigrants who started arriving in the early 1960s). Only about 25% of them are ethnic Russians, however. Before the dissolution of the Soviet Union, the overwhelming majority of Russophones in Brighton Beach, Brooklyn in New York City were Russian-speaking Jews. Afterward, the influx from the countries of the former Soviet Union changed the statistics somewhat, with ethnic Russians and Ukrainians immigrating along with some more Russian Jews and Central Asians. According to the United States Census, in 2007 Russian was the primary language spoken in the homes of over 850,000 individuals living in the United States.
Document 12: Russian language: In the 20th century, Russian was mandatorily taught in the schools of the members of the old Warsaw Pact and in other countries that used to be satellites of the USSR. In particular, these countries include Poland, Bulgaria, the Czech Republic, Slovakia, Hungary, Albania, former East Germany and Cuba. However, younger generations are usually not fluent in it, because Russian is no longer mandatory in the school system. According to the Eurobarometer 2005 survey, though, fluency in Russian remains fairly high (20–40%) in some countries, in particular those where the people speak a Slavic language and thereby have an edge in learning Russian (namely, Poland, Czech Republic, Slovakia, and Bulgaria).
Document 13: Russian language: In Georgia Russian has no official status, but it's recognised as a minority language under the Framework Convention for the Protection of National Minorities. According to estimates from Demoskop Weekly, in 2004 there were 130,000 native speakers of Russian in the country, and 1.7 million active speakers. 27% of the population was fluent in Russian in 2006, and 1% used it as the main language with family, friends or at work. Russian is the language of 9% of the population according to the World Factook. Ethnologue cites Russian as the country's de facto working language.
Document 14: Aegean Speed Lines: Aegean Speed Lines were formed in 2005 as a joint venture between Sea Containers and the Eugenides Group. Aegean Speed Lines were the first ferry company in Greece to use a European Union flag vessel on a domestic route following deregulation of ferry services in Greece. Sea Containers sold its share in 2006 leaving the Eugenides Group as the major shareholder.
Document 15: MS Silja Europa: The ferry was already painted in Viking Line's colors and almost ready to be handed over, when the Swedish krona was devalued by 10%, which led Slite into economic difficulties. Slite could not pay for the ship so Meyer Werft kept it and soon managed to charter it to Viking Line's rival, Silja Line. It was put on the Helsinki–Stockholm route, replacing MS "Silja Serenade" which was put to the Turku–Mariehamn–Stockholm route, but "Silja Europa" and "Silja Serenade" changed routes with each other in 1995.
ground_truth: 1809
sub_queries: SuperSeaCat >> country Answer: Finland
When did Finland join the Russian Empire? Answer: 1809