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She has appeared as a backing vocalist on music by artists including Go West , Simple Minds , Adam Rickitt , Robbie Williams , Cher , Bo Selecta , Swing Out Sister , Sheena Easton , The Blow Monkeys and most frequently Pet Shop Boys .
 person: Adam Rickitt; person: Robbie Williams; person: Cher; person: Sheena Easton
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: Adam Rickitt, Robbie Williams, Cher, Sheena Easton 
Answer:
 person: Adam Rickitt; person: Robbie Williams; person: Cher; person: Sheena Easton