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Police background Burns joined the police in 1939 , continuing a family tradition which had been started by his great-grandfather in 1840 .
 person: Burns
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: Burns 
Answer:
 person: Burns