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Cholera was not known in the Americas for most of the 20th century , but it reappeared towards the end of that century .
 location: Americas
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Americas 
Answer:
 location: Americas