Question: When was the swimming events at the 2014 South American Games held in Estadio Nacional Julio Martínez Prádanos?
Context: Athletics events at the 1990 South American Games were held at the Estadio Atlético de San Luis next to the Estadio Nacional in Lima, Perú, between December 6-9, 1990.  A total of 42 events were contested, 23 by men and 19 by women. This is a list of the best results achieved by athletes from different nations at four major competitions where swimming events are (or were) competed.  Results are based on major competitions according to FINA's historical records: the swimming and open water swimming events at the Olympic Games, the swimming and open water swimming events at the FINA World Aquatics Championships, the FINA Short Course Swimming World Championships and the defunct FINA World Open Water Swimming Championships.  The results listed here only refer to swimming and open water swimming events.  Medals earned by athletes from defunct NOCs or historical teams have been merged with the results achieved by their immediate successor states, as follows: Russia inherits medals from the Soviet Union and the Unified Team; Serbia inherits medals from Yugoslavia; Australia inherits medals from Australasia; and Germany inherits medals from West Germany and East Germany.  The table is pre-sorted by total number of gold medal results, silver medal results and bronze medal results, respectively.  When equal ranks are given, countries are listed in alphabetical order. Estadio Teodoro Lolo Fernández is a stadium in Lima, Peru, built in the 1950s and opened on July 20, 1952.  It is owned by the football club, Universitario de Deportes being their first stadium; one stand in the west for 4,000 spectators brought from the Estadio Nacional.  The inauguration game saw Universitario play Universidad de Chile where they won 4-2; Lolo Fernández scored three goals.  Universitario then bought a stand from the Peruvian Basketball Federation which served as the northern stand; capacity of 5,000 spectators.  They finally built the eastern stand for a capacity of 6,000 spectators.  This reached a maximum capacity of 15,000.  However the Estadio Lolo Fernández was not used for more important games.  The club chose to move those high-risk games to the Estadio Nacional which, at the time, had a capacity of 48,000. Estadio Nacional Julio Martínez Prádanos (originally known as Estadio Nacional) is the national stadium of Chile, and is located in the Ñuñoa district of Santiago.  It is the largest stadium in Chile with an official capacity of 48,665.  It is part of a 62 hectare sporting complex which also features tennis courts, an aquatics center, a modern gymnasium, a velodrome, a BMX circuit, and an assistant ground/warmup athletics track. Athletics at the 2014 South American Games took place between March 13–16, 2014.  The event was held at the Estadio Nacional Julio Martínez Prádanos in Santiago, Chile.  A total of 44 events were contested, 22 by men and 22 by women.  Detailed reports were given by Eduardo Biscayart for the IAAF.  A total of 29 games records (GR), (at least) 7 national records (NR), and 11 world leading marks (best mark worldwide in the current season, WL) were set. The swimming events at the 2014 South American Games were held from March 7-10 at the new Aquatic Center of the Estadio Nacional (trans: "National Stadium") in Santiago. The fastest times in the swimming events at the South American Games are designated as the South American Games records in swimming and maintained by the South American Swimming Confederation (CONSANAT). Athletics events at the 1986 South American Games were held at the Estadio Nacional in Santiago, Chile.  A total of 40 events were contested, 23 by men and 17 by women. The International Olympic Committee recognises the fastest performances in pool-based swimming events at the Olympic Games.  Men's swimming has been part of the Summer Olympics since the Games' modern inception in 1896; it was not until 1912 that women competed against each other.  The swimming events at the 1896 Olympic Games were held in a bay in the Aegean Sea with swimmers being required to swim to the shore—Hungarian swimmer Alfréd Hajós won two gold medals that year, saying "My will to live completely overcame my desire to win."  The 1900 Games in Paris saw the swimming events take place in the River Seine while the events at the 1908 Summer Olympics were hosted in a 100-metre pool located within an athletics track in the White City Stadium in London. Julio Martínez Prádanos (Temuco, Chile, June 23, 1923Santiago, Chile, January 2, 2008) was a Chilean sports commentator specializing in football who had a long career in the written press, radio and television.  He won the 1995 "Premio Nacional de Periodismo de Chile" (Chilean National Journalism Prize), awarded by the Chilean Ministry of Education.  He belongs to a generation of ever-lasting emblematic Chilean sports commentators, along with Sergio Livingstone, Pedro Carcuro, Alberto Fullioux, Nestor Isella and Milton Millas.
Answer: March 7-10