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He was graduated from the University of Oklahoma in 1967 , with a teaching degree in Physical Education , and joined the Bluegrass Boys shortly after .
 organization: University of Oklahoma; organization: Bluegrass
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: University of Oklahoma, Bluegrass 
Answer:
 organization: University of Oklahoma; organization: Bluegrass