 In the southern part of South America , the puma is a top level predator that has controlled the population of guanaco and other species since prehistoric times . 
 In the southern part of South America , the puma <a href='drop_aux' title='1'><mark>is</mark></a>a top level predator <a href='null_relcl' title='2'><mark>that</mark></a><a href='been_done' title='3'><mark>has</mark></a> controlled the population of guanaco and other species since prehistoric times . 
In da southern part of South America , tdapuma a top level predator done controlled thdaopulation of guanaco and other species since prehistoric times .