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He became a member of the Sigma Chi Fraternity as an undergraduate .
 organization: Sigma Chi Fraternity
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: Sigma Chi Fraternity 
Answer:
 organization: Sigma Chi Fraternity