Individual #Rio_de_la_Plata__La_Plata__Plata_River  an estuary between Argentina and Uruguay
  instance of:  estuary
  part of:  Argentina__Argentine_Republic__the_Argentine  a republic in southern South America; second largest country in South America
     part of:  South_America  a continent in the western hemisphere connected to North America by the Isthmus of Panama
        part of:  southern_hemisphere  the hemisphere south of the equator
        part of:  western_hemisphere__westernhemisphere__occident__New_World  the hemisphere that includes North and South America
        part of:  the_Americas__America  North and South America
  part of:  Uruguay  a South American republic on the southeast coast of South America; achieved independence from Brazil in 1825
     part of:  South_America  a continent in the western hemisphere connected to North America by the Isthmus of Panama

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