In this task, you are given a context, a subject, a relation, and many options. Based on the context, from the options select the object entity that has the given relation with the subject. Answer with text (not indexes).

Context: Ecuador, officially the Republic of Ecuador (which literally translates as "Republic of the Equator"), is a representative democratic republic in northwestern South America, bordered by Colombia on the north, Peru on the east and south, and the Pacific Ocean to the west. Ecuador also includes the Galápagos Islands in the Pacific, about west of the mainland., The Río de la Plata ("River of Silver")  rendered River Plate in British English and the Commonwealth and La Plata River (occasionally Plata River) in other English-speaking countries  is the river and estuary formed by the confluence of the Uruguay and the Paraná rivers. It empties into the Atlantic Ocean, forming a funnel-shaped indentation on the southeastern coastline of South America., Tacuarembó is the capital city of the Tacuarembó Department in north-central Uruguay., Treinta y Tres is a department of Uruguay. Its capital is Treinta y Tres. It is located in the east of the country, bordering the departments of Cerro Largo to the north, Durazno and Florida to the west, Lavalleja and Rocha to the south, while to its east is the lake Laguna Merín separating it from the southernmost end of Brazil., Uruguay, officially the Oriental Republic of Uruguay, is a country in the southeastern region of South America. It borders Argentina to its west and Brazil to its north and east, with the Río de la Plata (River of Silver) to the south and with the Atlantic Ocean to the southeast. Uruguay is home to an estimated 3.42 million people, of whom 1.8 million live in the metropolitan area of its capital and largest city, Montevideo. With an area of approximately , Uruguay is geographically the second-smallest nation in South America, only larger in size than Suriname., The megadiverse countries are a group of countries that harbor the majority of Earth's species and high numbers of endemic species. Conservation International identified 17 megadiverse countries in 1998. Many of them are located in, or partially in, tropical or subtropical regions., Rivera is the capital of Rivera Department of Uruguay. The border with Brazil joins it with the Brazilian city of Santana do Livramento, which is only a street away from it. Together, they form an urban area of around 200,000 inhabitants. As of the census of 2011, it is the sixth most populated city of Uruguay., Cerro Largo Department is a department of Uruguay. Its capital is Melo. It is located in the east of the country, bordering Brazil to its northeast with Yaguaron River as the natural border, Treinta y Tres Department to its south, Durazno Department to its west and the departments of Tacuarembó and Rivera to its northwest with Negro River as its natural border with them., South America is a continent located in the western hemisphere, mostly in the southern hemisphere, with a relatively small portion in the northern hemisphere. It is also considered a subcontinent of the Americas, which is the model used in nations that speak Romance languages. The reference to South America instead of other regions (like Latin America or the Southern Cone) has increased in the last decades due to changing geopolitical dynamics (in particular, the rise of Brazil)., Paysandú Department is a department of the northwestern region of Uruguay. It has an area of and a population of 113,124. Its capital is the city of Paysandú. It borders Salto Department to its north, Tacuarembó Department to its east, Río Negro Department to its south and has the Río Uruguay flowing at its west, separating it from Argentina., A "metropolitan area", sometimes referred to as a "metro area" or just "metro", is a region consisting of a densely populated urban core and its less-populated surrounding territories, sharing industry, infrastructure, and housing.
A metro area usually comprises multiple jurisdictions and municipalities: neighborhoods, townships, boroughs, cities, towns, exurbs, suburbs, counties, districts, states, and even nations like the eurodistricts. As social, economic and political institutions have changed, metropolitan areas have become key economic and political regions. Metropolitan areas include one or more urban areas, as well as satellite cities, towns and intervening rural areas that are socio-economically tied to the urban core, typically measured by commuting patterns., Argentina, officially the Argentine Republic, is a federal republic in the southern half of South America. Sharing the bulk of the Southern Cone with its neighbor Chile to the west, the country is also bordered by Bolivia and Paraguay to the north, Brazil to the northeast, Uruguay and the South Atlantic Ocean to the east, and the Drake Passage to the south. With a mainland area of , Argentina is the eighth-largest country in the world, the second largest in Latin America, and the largest Spanish-speaking one. The country is subdivided into twenty-three provinces (singular "provincia") and one autonomous city ("ciudad autónoma"), Buenos Aires, which is the federal capital of the nation as decided by Congress.
The provinces and the capital have their own constitutions, but exist under a federal system., Rivera Department is a department of the northern region of Uruguay . It has an area of 9,370 km2 ( 3,620 sq mi ) and a population of 103,493 . Its capital is the city of Rivera . It borders Brazil to the north and east , Cerro Largo Department to the southeast , Tacuarembó Department to the south and west and Salto Department to the northwest ., Latin America is a group of countries and dependencies in the Americas where Romance languages are predominant. The term originated in 19th century France as "Amérique latine" to consider French-speaking territories in the Americas (Haiti, French Guiana, Martinique, Guadeloupe, Saint Martin, Saint Barthélemy) along with the larger group of countries where Spanish and Portuguese languages prevailed. It is therefore broader than the terms Ibero-America or Hispanic Americathough it usually excludes French Canada and modern French Louisiana., Brazil, officially the Federative Republic of Brazil, is the largest country in both South America and Latin America. As the world's fifth-largest country by both area and population, it is the largest country to have Portuguese as an official language and the only one in the Americas. Bounded by the Atlantic Ocean on the east, Brazil has a coastline of . It borders all other South American countries except Ecuador and Chile and covers 47.3% of the continent's land area. Its Amazon River basin includes a vast tropical forest, home to diverse wildlife, a variety of ecological systems, and extensive natural resources spanning numerous protected habitats. This unique environmental heritage makes Brazil one of 17 megadiverse countries, and is the subject of significant global interest and debate regarding deforestation and environmental protection., Salto Department is a department of the northwestern region of Uruguay. It has an area of and a population of 124,878. Its capital is the city of Salto. It borders Artigas Department to its north, Paysandú Department to its south, the departments of Rivera and Tacuarembó to its east and has the Río Uruguay flowing at its west, separating it from Argentina., Durazno is a department of Uruguay. Its capital is Durazno. Its name means ""peach"" in Spanish, referring to the department's peaches and its status as an agricultural breadbasket. It is located in the centre of the country, and is bounded to the north by the Río Negro and the Río Yi to the South. To its north are the departments of Río Negro and Tacuarembó, to it southeast the departments of Treinta y Tres, to its south the departments of Flores and Florida, while on its east is the department of Cerro Largo., Chile, officially the Republic of Chile, is a South American country occupying a long, narrow strip of land between the Andes to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far south. Chilean territory includes the Pacific islands of Juan Fernández, Salas y Gómez, Desventuradas, and Easter Island in Oceania. Chile also claims about of Antarctica, although all claims are suspended under the Antarctic Treaty., Montevideo is the capital and largest city of Uruguay. According to the 2011 census, the city proper has a population of 1,319,108 (about one-third of the country's total population) in an area of . The southernmost capital city in the Americas, Montevideo is situated in the southern coast of the country, on the northeastern bank of the Río de la Plata., Suriname (or , also spelled Surinam), officially known as the Republic of Suriname, is a sovereign state on the northeastern Atlantic coast of South America. It is bordered by French Guiana to the east, Guyana to the west and Brazil to the south. At just under , it is the smallest country in South America. Suriname has a population of approximately 566,000, most of whom live on the country's north coast, in and around the capital and largest city, Paramaribo., Artigas Department is the northernmost department of Uruguay, located in its northwestern region. Its capital is the city of Artigas, which borders on the Brazilian city of Quaraí. Artigas Department has an area of , making it the fifth largest in the country. The population is 73,378 inhabitants, according to the 2011 census., Tacuarembó is the largest department of Uruguay and it is part of its northern region. Its capital is Tacuarembó. It borders Rivera Department to its north and east, the departments of Salto, Paysandú and Río Negro to its west and has the river Río Negro flowing along its south border, separating it from the departments of Durazno and Cerro Largo., A country is a region that is identified as a distinct national entity in political geography. A country may be an independent sovereign state or one that is occupied by another state, as a non-sovereign or formerly sovereign political division, or a geographic region associated with sets of previously independent or differently associated people with distinct political characteristics. Regardless of the physical geography, in the modern internationally accepted legal definition as defined by the League of Nations in 1937 and reaffirmed by the United Nations in 1945, a resident of a country is subject to the independent exercise of legal jurisdiction., Santana do Livramento is a city in the state of Rio Grande do Sul, Brazil. It is located along the border with the city of Rivera, Uruguay, forming together an international city of almost 170,000 inhabitants., Subject: rivera department, Relation: instance_of, Options: (A) 1937 (B) area (C) autonomous city (D) brazil (E) buenos aires (F) capital (G) century (H) city (I) confluence (J) congress (K) conservation (L) continent (M) country (N) department (O) department of uruguay (P) estuary (Q) federal republic (R) geography (S) group (T) harbor (U) home (V) jurisdiction (W) lake (X) league (Y) may (Z) metropolitan ([) metropolitan area (\) model (]) nation (^) part (_) people (`) population (a) representative (b) republic (c) river (d) romance (e) saint (f) sharing (g) size (h) street (i) subcontinent (j) system (k) territory (l) three (m) treaty
department of uruguay