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In 1925 , Clark University hosted a symposium on psychical research , and , together with Harvard psychologist William McDougall , Murphy argued for the respect of the field as an academic discipline , while recognizing the difficulties of scientific acceptance and experimentation .
 person: Murphy
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: Murphy 
Answer:
 person: Murphy