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But while adhering to the underlying principle that " some " boundary is necessary , " MacPherson " overruled the prior common law by rendering the formerly dominant factor in the boundary , that is , the privity formality arising out of a contractual relationship between persons , totally irrelevant .
 person: MacPherson
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: MacPherson 
Answer:
 person: MacPherson