paragraph_text: The Republic of Bergamo (Italian: "Repubblica Bergamasca") was an ephemeral revolutionary client republic, created on 13 March 1797 by the French army to rule the local administration of Bergamo and its province, during the dissolution of the Republic of Venice. With the Preliminary of Leoben, France and Austria agreed the end of the multi-centennial Venetian rule over the territory between Adda River and Oglio River, together with the Austrian occupation of Istria and Dalmatia.

paragraph_text: Tumcha River () is a river in the south of the Kola Peninsula in Murmansk Oblast, Russia. It is in length. The area of its basin is . The river originates in the merger Kutsayoki River and Tuntsayoki River and flows into the Iova Reservoir which in turn is part of the Kovda River basin.

paragraph_text: The Luján River (Spanish, Río Luján) runs from its source near Espora about east of Buenos Aires, Argentina, to its outflow into the Río de la Plata north of the city.

paragraph_text: The Gudgenby River, a perennial river that is part of the Murrumbidgee catchment within the Murray-Darling basin, is located in the Australian Capital Territory, Australia.

paragraph_text: The Shire of Kerang was a local government area located in northwestern Victoria, Australia, along the Murray River. The shire covered an area of , and existed from 1862 until 1995. From 1966 onwards, Kerang itself was managed by a separate entity; the Borough of Kerang.

paragraph_text: Klarälven ("The clear river" in Swedish) is a river flowing through Norway and Sweden. Together with Göta älv, which it is called as the river has passed through the lake Vänern, thus regarded as an entity, Göta älv—Klarälven is the longest river in Scandinavia and in the Nordic countries and its Swedish part the longest river of Sweden. These two rivers also have the largest drainage basin in the same areas, including all the rivers that run into Vänern, of which is located in Sweden and in Norway.

paragraph_text: The Cuyuni River is a South American river and a tributary of the Essequibo River. It rises in the Guiana Highlands of Venezuela where it descends northward to El Dorado, and turns eastward to meander through the tropical rain forests of Guyana. It finally turns southeastward, flowing to its confluence with the Mazaruni River. The Cuyuni River marks the limit of the disputed territory of Guayana Esequiba for approximately .

paragraph_text: After the ratification of the Treaty of Paris of 1898, Puerto Rico came under the military control of the United States of America. This brought about significant changes: the name of the island was changed to Porto Rico (it was changed back to Puerto Rico in 1932) and the currency was changed from the Puerto Rican peso to the United States dollar. Freedom of assembly, speech, press, and religion were decreed and an eight-hour day for government employees was established. A public school system was begun and the U.S. Postal service was extended to the island. The highway system was enlarged, and bridges over the more important rivers were constructed. The government lottery was abolished, cockfighting was forbidden, and a centralized public health service established. Health conditions were poor at the time, with high rates of infant mortality and numerous endemic diseases.

paragraph_text: San Vincenzo al Volturno is a historic Benedictine monastery located in the territories of the Comunes of Castel San Vincenzo and Rocchetta a Volturno, in the Province of Isernia, near the source of the river Volturno in Italy. The current monastery, housing a group 8 benedictin nuns, is located to the east of the river, while the archaeological monastery of the early Middle Ages was located on the west.

paragraph_text: The Lianghekou Dam ("meaning:" "mouth of two rivers") is a concrete-face rock-fill dam currently under construction on the Yalong River in Yajiang County, Sichuan Province, China. The dam is located at the confluence of the Yalong, Xianshui and Qingda Rivers. The tall dam will be the highest embankment dam in the country and support a 3,000 MW power station. Studies for the dam were completed between 2005 and 2009 with preliminary construction beginning that year. Major works on the dam officially began in October 2014. The first generator is expected to be commissioned in 2021 and the project complete in 2023.

paragraph_text: The Neilson River flows into the territory of the municipality of Saint-Raymond, in the Portneuf Regional County Municipality, in the administrative region of the Capitale-Nationale, in Quebec, in Canada.

paragraph_text: Bogotá (/ ˈboʊɡətɑː /, / ˌbɒɡəˈtɑː /, / ˌboʊ - /; Spanish pronunciation: (boɣoˈta) (listen)), officially Bogotá, Distrito Capital, abbreviated Bogotá, D.C., and formerly known as Santafé de Bogotá between 1991 and 2000, is the capital and largest city of Colombia, administered as the Capital District, although often thought of as part of Cundinamarca. Bogotá is a territorial entity of the first order, with the same administrative status as the departments of Colombia. It is the political, economic, administrative, industrial, artistic, cultural, and sports center of the country.

paragraph_text: The hamlet Matawin River (popularly designated "Mattawin") is located on the east bank of the Saint-Maurice River, in Trois-Rives, in Mékinac Regional County Municipality, in Mauricie, in Quebec, in Canada. In the past, Matawin River was a municipality. Today, the territory of Matawin hamlet is a sector incorporated to the municipality of Trois-Rives.

paragraph_text: The Bulkley Ranges is mountain range in northern British Columbia, Canada, located between the Skeena and Bulkley Rivers south of Hazelton, north of the Morice River and Zymoetz River. It has an area of 7851 km and is a subrange of the Hazelton Mountains which in turn form part of the Interior Mountains.

paragraph_text: The La Plata River () is the longest river in the island of Puerto Rico. It is located in the north coast of the island. It flows from south to north, and drains into the Atlantic Ocean about 11 miles (18 km) west of San Juan. The mouth of the river is a resort area with white sandy beaches.

paragraph_text: Tatarka River () is a river in Perm Krai, Russia, a right bank tributary of the Babka River, which in turn is a tributary of the Sylva River. The river is long.

paragraph_text: The Lubefu River is a tributary of the Sankuru River, which in turn is a tributary of the Kasai River in the Democratic Republic of the Congo.

paragraph_text: The Bermudian dollar (symbol: $; code: BMD; also abbreviated BD$; informally called the Bermuda dollar) is the official currency of the British Overseas Territory of Bermuda.  It is subdivided into 100 cents. The Bermudian dollar is not normally traded outside Bermuda, and is pegged to the United States dollar at a one-to-one ratio.  Both currencies circulate in Bermuda on an equal basis.

paragraph_text: Orroral River, a perennial stream of the Murrumbidgee catchment within the Murray-Darling basin, is located in the Australian Capital Territory, Australia.

paragraph_text: The Mékinac river is a located in the RCM Mekinac Regional County Municipality, in the administrative region of Mauricie, the province of Quebec, in Canada. This river of Middle Mauricie has played an important role in the forestry industry at the end of the 19th century.

Question: What is the current official currency in the country where the river that Lujan River turns into is located?
Answer: United States dollar