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These high-level summit meetings have been organized by a number of multilateral bodies under the aegis of the Organization of American States .
 organization: Organization of American States
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: Organization of American States 
Answer:
 organization: Organization of American States