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The same year , he met Bill Monroe at the Newport Folk Festival and was offered a job with the Bluegrass Boys but he turned it down because he had to finish his education .
 person: Bill Monroe; organization: Festival; 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: Bill Monroe, Festival, Bluegrass 
Answer:
 person: Bill Monroe; organization: Festival; organization: Bluegrass