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Since being involved in activism , he helped to start Boston 's gun-buyback program , founded the South Boston Vigil Group , which works with survivor families and young people in Boston ’s anti-violence movement .
 location: Boston; location: Boston; location: Boston
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: Boston, Boston, Boston 
Answer:
 location: Boston; location: Boston; location: Boston