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In The Evolving Self , Kegan presents a model of psychological development consisting of six " equilibrium stages " : the incorporative stage , the impulsive stage , the imperial stage , the interpersonal stage , the institutional stage , and the inter-individual stage .
 person: Kegan
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: Kegan 
Answer:
 person: Kegan