Question: What country sent the most legal immigrants to Gotham's filming location from the middle leg of the journey from England to the continent of Sobat River to the Americas?

<P0-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. <P0-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. <SEP> <P1-S0> argentina: the torch relay leg in buenos aires, argentina, held on april 11, began with an artistic show at the lola mora amphitheatre in costanera sur. <P1-S1> in the end of the show the mayor of buenos aires mauricio macri gave the torch to the first torchbearer, carlos espínola. <P1-S2> the leg finished at the buenos aires riding club in the palermo district, the last torchbearer being gabriela sabatini. <P1-S3> the 13.8 km route included landmarks like the obelisk and plaza de mayo. <P1-S4> the day was marked by several pro-tibet protests, which included a giant banner reading "free tibet", and an alternative "human rights torch" that was lit by protesters and paraded along the route the flame was to take. <P1-S5> most of these protests were peaceful in nature, and the torch was not impeded. <P1-S6> chinese immigrants also turned out in support of the games, but only minor scuffles were reported between both groups. <P1-S7> runners surrounded by rows of security carried the olympic flame past thousands of jubilant argentines in the most trouble-free torch relay in nearly a week. <P1-S8> people showered the parade route with confetti as banks, government offices and businesses took an impromptu half-day holiday for the only latin american stop on the flame's five-continent journey. <SEP> <P2-S0> the pony express museum is a transport museum in saint joseph, missouri, documenting the history of the pony express, the first fast mail line across the north american continent from the missouri river to the pacific coast. <P2-S1> the museum is housed in a surviving portion of the pike's peak stables, from which westward-bound pony express riders set out on their journey. <SEP> <P3-S0> Historically the particular routes were also shaped by the powerful influence of winds and currents during the age of sail. <P3-S1> For example, from the main trading nations of Western Europe it was much easier to sail westwards after first going south of 30 N latitude and reaching the so - called ``trade winds ''; thus arriving in the Caribbean rather than going straight west to the North American mainland. <P3-S2> Returning from North America, it is easiest to follow the Gulf Stream in a northeasterly direction using the westerlies. <P3-S3> A similar triangle to this, called the volta do mar was already being used by the Portuguese, before Christopher Columbus' voyage, to sail to the Canary Islands and the Azores. <P3-S4> Columbus simply expanded the triangle outwards, and his route became the main way for Europeans to reach, and return from, the Americas. <SEP> <P4-S0> The Sobat River is a river of the Greater Upper Nile region in northeastern South Sudan, Africa. <P4-S1> It is the most southerly of the great eastern tributaries of the White Nile, before the confluence with the Blue Nile. <SEP> <P5-S0> In February 2014, it was reported that production would begin in New York City in March. <P5-S1> Filming for the first season finished on March 24, 2015.