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He is related to Sir Johnston , being the grandson of one of Sir Johnston 's brothers .
 person: Johnston; person: Johnston
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: Johnston, Johnston 
Answer:
 person: Johnston; person: Johnston