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When Juan Manuel Santos was elected president in August 2010 , he promised to " continue the armed offensive " against rebel movements .
 person: Juan Manuel Santos
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: Juan Manuel Santos 
Answer:
 person: Juan Manuel Santos