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Perhaps the most popular advocate of the principle of " Ahimsa " was Mahatma Gandhi .
 person: Mahatma Gandhi
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: Mahatma Gandhi 
Answer:
 person: Mahatma Gandhi