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On its release , many fans and critics were taken aback by its strong " mainstream " or " commercial " sound , highlighted by the guest appearances of pop-rap stars like Missy Elliott and P. Diddy , two artists that are involved with much different facets of rap music .
 person: Missy Elliott; person: P. Diddy
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: Missy Elliott, P. Diddy 
Answer:
 person: Missy Elliott; person: P. Diddy