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Edward Garrison Walker , also known as Edwin Garrison Walker , ( 1830-1901 ) shared with Charles Mitchell the distinction in 1866 of being the first black men elected to the Massachusetts State Legislature .
 person: Walker; person: Walker; location: Massachusetts
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: Walker, Walker, Massachusetts 
Answer:
 person: Walker; person: Walker; location: Massachusetts