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Career Bristol Rovers A product the of Rovers youth system , Richards joined the professional ranks at the club in the summer of 2009 , along with fellow youth players Neikell Plummer , Dan Cayford , Mark Cooper , Ollie Clarke , George Booth , Steve Kingdon and Jack McKenna .
 organization: Bristol Rovers; organization: Rovers; person: Richards; person: Ollie Clarke
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: Bristol Rovers, Rovers, Richards, Ollie Clarke 
Answer:
 organization: Bristol Rovers; organization: Rovers; person: Richards; person: Ollie Clarke