Question: Who is the new president of the country providing the most legal immigrants in 2013 from the continent where the river Tebicuary River is a tributary of is found?

full_context: Document 1: 2017 French presidential election: The 2017 French presidential election was held on 23 April and 7 May 2017. As no candidate won a majority in the first round on 23 April, a run - off was held between the top two candidates, Emmanuel Macron of En Marche! and Marine Le Pen of the National Front (FN), which Macron won by a decisive margin on 7 May. The presidential election was followed by legislative elections to elect members of the National Assembly on 11 and 18 June. Incumbent president François Hollande of the Socialist Party (PS) was eligible to run for a second term, but declared on 1 December 2016 that he would not seek reelection in light of low approval ratings, making him the first incumbent president of the Fifth Republic not to seek re-election.
Document 2: New York City: The wider New York City metropolitan area, with over 20 million people, about 50% greater than the second-place Los Angeles metropolitan area in the United States, is also ethnically diverse. The New York region continues to be by far the leading metropolitan gateway for legal immigrants admitted into the United States, substantially exceeding the combined totals of Los Angeles and Miami, the next most popular gateway regions. It is home to the largest Jewish as well as Israeli communities outside Israel, with the Jewish population in the region numbering over 1.5 million in 2012 and including many diverse Jewish sects from around the Middle East and Eastern Europe. The metropolitan area is also home to 20% of the nation's Indian Americans and at least 20 Little India enclaves, as well as 15% of all Korean Americans and four Koreatowns; the largest Asian Indian population in the Western Hemisphere; the largest Russian American, Italian American, and African American populations; the largest Dominican American, Puerto Rican American, and South American and second-largest overall Hispanic population in the United States, numbering 4.8 million; and includes at least 6 established Chinatowns within New York City alone, with the urban agglomeration comprising a population of 779,269 overseas Chinese as of 2013 Census estimates, the largest outside of Asia.
Document 3: Paraguay River: The Paraguay River (Río Paraguay in Spanish, Rio Paraguai in Portuguese, Ysyry Paraguái in Guarani) is a major river in south-central South America, running through Brazil, Bolivia, Paraguay and Argentina. It flows about from its headwaters in the Brazilian state of Mato Grosso to its confluence with the Paraná River north of Corrientes and Resistencia.
Document 4: Paraguay: Paraguay (; ; , ), officially the Republic of Paraguay (; ), is a country in South America. It is bordered by Argentina to the south and southwest, Brazil to the east and northeast, and Bolivia to the northwest. Although it is one of only two landlocked countries in South America (the other is Bolivia), the country has coasts, beaches and ports on the Paraguay and Paraná rivers that give exit to the Atlantic Ocean through the . Due to its central location in South America, it is sometimes referred to as "Corazón de Sudamérica" ("Heart of South America").
Document 5: 2017 Ecuadorian general election: General elections were held in Ecuador on 19 February 2017 alongside a referendum on tax havens. Voters elected a new President and National Assembly. Incumbent President Rafael Correa of the PAIS Alliance was not eligible for re-election, having served two terms. In the first round of the presidential elections, PAIS Alliance candidate Lenín Moreno received 39% of the vote. Although he was more than 10% ahead of his nearest rival, Guillermo Lasso of the Creating Opportunities party, Moreno was just short of the 40% threshold required to avoid a run - off. As a result a second round was held on 2 April. In the second round Moreno was elected President with 51.16% of the vote.
Document 6: 2018 Colombian presidential election: Presidential elections were held in Colombia on 27 May 2018. As no candidate received a majority of the vote, a second round was held on 17 June. Incumbent President Juan Manuel Santos is ineligible for re-election, having already served two terms. President Iván Duque is serving a four - year term from 7 August 2018 to 7 August 2022.
Document 7: Putumayo River: The Putumayo River or Içá River (, ) is one of the tributaries of the Amazon River, west of and parallel to the Japurá River.
Document 8: Quiquibey River: The Quiquibey River is a river in the Pilón Lajas Biosphere Reserve and Communal Lands in the north of Bolivia. The Quiquibey River joins the Beni River south of Rurrenabaque (upstream and south of Beni's tributary the Tuichi River). The river is the border between the departments of Beni and La Paz.
Document 9: Mexico City: On the other hand, Mexico City is also home to large communities of expatriates and immigrants, most notably from the rest of North America (U.S. and Canada), from South America (mainly from Argentina and Colombia, but also from Brazil, Chile, Uruguay and Venezuela), from Central America and the Caribbean (mainly from Cuba, Guatemala, El Salvador, Haiti and Honduras); from Europe (mainly from Spain, Germany and Switzerland, but also from Czech Republic, Hungary, France, Italy, Ireland, the Netherlands, Poland and Romania), from the Middle East (mainly from Egypt, Lebanon and Syria); and recently from Asia-Pacific (mainly from China and South Korea). Historically since the era of New Spain, many Filipinos settled in the city and have become integrated in Mexican society. While no official figures have been reported, population estimates of each of these communities are quite significant.
Document 10: Bermejo River: The Bermejo River (Spanish, Río Bermejo) is a river in South America that flows from Bolivia to the Paraguay River in Argentina. The river is generally called Bermejo in spite of its different names along its way, but it also has its own Native American names; in Wichí it is called Teuco, and in Guaraní it is called Ypitá. In the plains of Argentina's Gran Chaco the Bermejo forms wetlands and splits into two branches. The southern branch is the bed of the old Bermejo River, now an intermittent stream called Río Bermejito. The northern branch is now the main stem of the Bermejo and is called the Teuco River ("Río Teuco"), Bermejo Nuevo, or simply the Bermejo River. The two branches rejoin at , near Villa Río Bermejito, forming the Lower Bermejo River.
Document 11: New York City: Ecuador, Colombia, Guyana, Peru, and Brazil were the top source countries from South America for legal immigrants to the New York City region in 2013; the Dominican Republic, Jamaica, Haiti, and Trinidad and Tobago in the Caribbean; Egypt, Ghana, and Nigeria from Africa; and El Salvador, Honduras, and Guatemala in Central America. Amidst a resurgence of Puerto Rican migration to New York City, this population had increased to approximately 1.3 million in the metropolitan area as of 2013.
Document 12: 2017 Ecuadorian general election: General elections were held in Ecuador on 19 February 2017 alongside a referendum on tax havens. Voters elected a new President and National Assembly. Incumbent President Rafael Correa of the PAIS Alliance was not eligible for re-election, having served two terms. In the first round of the presidential elections, PAIS Alliance candidate Lenín Moreno received 39% of the vote. Although he was more than 10% ahead of his nearest rival, Guillermo Lasso of the Creating Opportunities party, Moreno was just short of the 40% threshold required to avoid a run - off. As a result, a second round was held on 2 April. In the second round Moreno was elected President with 51.16% of the vote.
Document 13: São Lourenço River (Mato Grosso): The São Lourenço River is a tributary of the Paraguay River within the Pantanal, an alluvial plain that spans portions of Brazil, Bolivia and Paraguay.
Document 14: New York City: Approximately 37% of the city's population is foreign born. In New York, no single country or region of origin dominates. The ten largest sources of foreign-born individuals in the city as of 2011 were the Dominican Republic, China, Mexico, Guyana, Jamaica, Ecuador, Haiti, India, Russia, and Trinidad and Tobago, while the Bangladeshi immigrant population has since become one of the fastest growing in the city, counting over 74,000 by 2013.
Document 15: Tebicuary River: The Tebicuary River (Spanish: Río Tebicuary), a tributary of Paraguay River is a river in Paraguay. Located in the southwestern part of that country, it flows eastwards discharging to Paraguay River about 45 km south of Formosa and 30 km north of Pilar.
ground_truth: Lenín Moreno
sub_queries: What is Tebicuary River a tributary of? Answer: Paraguay River
Which continent is Paraguay River on? Answer: South America
Of all the countries in South America , which provided the most legal immigrants in 2013? Answer: Ecuador
who is the new elected president of Ecuador Answer: Lenín Moreno