Question: when did the country where Saana is located join the Russian Empire?

full_context: Document 1: 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 2: Feigenbaumklippe: The Feigenbaumklippe is a rock formation in the Oker valley in the Harz mountains of central Germany. They lie on the hiking trail from the "Kästeklippen" crags to Romkerhall Waterfall. These granite rocks, which show clear signs of "wool sack weathering" ("Wollsackverwitterung") are a favourite destination for hikers and offer a good view of the valley towards the west. The observation point has safety railings.
Document 3: 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 4: Lima Mountain: Lima Mountain is a 2238 foot summit in Cook County, Minnesota. It is located in the Lima Mountain Unit, a 2540 acre inventoried roadless area adjacent to the Boundary Waters Canoe Area. There is a 1 mile trail to the summit, where a fire tower once stood. Lima Mountain has a 328 foot rise over the saddle connecting it with the Misquah Hills High Point and Peak 2266. A trail to the summit begins along the Lima Grade (Forest Route 315) just north of its junction with Lima Mountain Road (Forest Route 152)
Document 5: Mount Sentsū: , also known in English as Sentsūzan, is a mountain located on the border of Nichinan, Tottori Prefecture and Okuizumo, Shimane Prefecture. Mount Sentsū has an elevation of and is one of the highest peaks in the Chūgoku Mountain Range and part of the Hiba-Dogo-Taishaku Quasi-National Park. Mount Sentsū was historically on the border of the ancient provinces of Hōki Province and Izumo Province. The base of Mount Sentsū is primarily composed of granite. This granite is a rich source of iron sand, and the mountain was historically known as a source for this material.
Document 6: Sulayman Mountain: According to the UNESCO, the mountain is "the most complete example of a sacred mountain anywhere in Central Asia, worshipped over several millennia". The site is still a popular place for local Muslims, with stairs leading up to the highest peak where there stands a small mosque originally built by Babur in 1510. Much of the mosque was reconstructed in the late 20th century.
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: Sharp Peak: Sharp Peak, also known as Nam She Tsim (蚺蛇尖), is a hill which lies within the Sai Kung East Country Park, north of Tai Long Wan, in the Sai Kung Peninsula in Hong Kong. It is particularly well known for its well defined sharp peak, which rises to a height of above sea level. The hill is reasonably hard for hikers and should only be attempted in good weather with correct equipment, although it is a popular site for hiking in Hong Kong.
Document 9: Säntis: At 2,501.9 metres above sea level, Säntis is the highest mountain in the Alpstein massif of northeastern Switzerland. It is also the culminating point of the whole Appenzell Alps, between Lake Walen and Lake Constance. Shared by three cantons, the mountain is a highly visible landmark thanks to its exposed northerly position within the Alpstein massif. As a consequence, houses called "Säntisblick" (English: "Säntis view") can be found in regions as far away as the Black Forest in Germany. Säntis is among the most prominent summits in the Alps and the most prominent summit in Europe with an observation deck on the top. The panorama from the summit is spectacular. Six countries can be seen if the weather allows: Switzerland, Germany, Austria, Liechtenstein, France, and Italy.
Document 10: 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 11: 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 12: 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 13: Namsan (Gyeongju): Namsan (남산, "South Mountain") is a 494-meter peak in the heart of Gyeongju National Park, just south of Gyeongju, South Korea. The mountain is within easy reach from the city and attracts a large number of national tourists. Namsan covers an area of about 8 km (north-south) by 12 km (east-west). Some 180 peaks are counted, of which Geumobong (468 m) and Gouibong (495 m) are the best-known. There are about 40 valleys.
Document 14: Saana: Saana () is a fell in Enontekiö, Finland. Saana's summit lies above sea level and above the adjacent Kilpisjärvi lake. Geologically it is part of the Scandinavian Mountains, and is made of the same kinds of schist and gneiss rock. The mountain was historically considered sacred to the Sami people. The peak is a popular destination for hikers and backpackers because of the sweeping views offered at the summit.
Document 15: 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.
ground_truth: 1809
sub_queries: Saana >> country Answer: Finland
When did Finland join the Russian Empire? Answer: 1809