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In November 2008 she was appointed Chief Executive and Permanent Secretary of HM Revenue and Customs , succeeding Dave Hartnett who had worked as Acting Chief Executive and Chairman after the resignation of Paul Gray .
 person: Dave Hartnett; person: Paul Gray
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: Dave Hartnett, Paul Gray 
Answer:
 person: Dave Hartnett; person: Paul Gray