Question: What type of government is in the country that, out of all countries in the continent where the mouth of the Sao Lourenco River can be found, provided the most immigrants in 2013?

<P0-S0> The politics of Ecuador are multi-party. <P0-S1> The President of Ecuador is head of state and head of government on a multi-party system, leading a cabinet with further executive power. <P0-S2> Legislative power is not limited to the National Assembly as it may to a lesser degree be exercised by the executive which consists of the President convening an appointed executive cabinet. <P0-S3> Subsequent acts of the National Assembly are supreme over Executive Orders where sufficient votes have been cast by the legislators. <P0-S4> The central government polity is a four - yearly elected presidential, unicameral representative democracy. <P0-S5> The judiciary is independent of the executive and the legislature. <P0-S6> There is also constitutional republic <SEP> <P1-S0> the back river is an estuarine inlet of the chesapeake bay between the independent cities of hampton and poquoson in the hampton roads area of southeastern virginia. <P1-S1> formed by the confluence of the northwest and southwest branches, and at just over two miles long, the back river is a breeding ground for many of the bay's prized sport fish and the well known blue crab. <P1-S2> the river was once part of an important fishing area that provided the local canneries with the famous chesapeake seafood that was, and still is in demand throughout the country. <P1-S3> although now used primarily for recreation and as a wildlife refuge, the river remains a great place to spend an afternoon with a fishing rod or a few crab traps. <P1-S4> factory point, a peninsula that protects the river from the chesapeake bay sits at the mouth of the river adjoining the bay. <SEP> <P2-S0> the constitution of south africa is the supreme law of the country of south africa. <P2-S1> it provides the legal foundation for the existence of the republic, sets out the rights and duties of its citizens, and defines the structure of the government. <P2-S2> the current constitution, the country's fifth, was drawn up by the parliament elected in 1994 in the first non-racial elections. <P2-S3> it was promulgated by president nelson mandela on 18th december 1996 and came into effect on 4 february 1997, replacing the interim constitution of 1993. <SEP> <P3-S0> 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. <SEP> <P4-S0> 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. <P4-S1> 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. <SEP> <P5-S0> 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. <P5-S1> 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.