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Dean Close is a member of the Headmasters ' and Headmistresses ' Conference .
 organization: Dean Close; organization: Headmasters ' and Headmistresses ' Conference
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: Dean Close, Headmasters ' and Headmistresses ' Conference 
Answer:
 organization: Dean Close; organization: Headmasters ' and Headmistresses ' Conference