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The Pool Group were a trio of interwar period artists , filmmakers and poets consisting of Hilda Doolittle , Kenneth Macpherson and Bryher ( Annie Winifred Ellerman ) .
 person: Hilda Doolittle; person: Kenneth Macpherson; person: Bryher; person: Ellerman
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: Hilda Doolittle, Kenneth Macpherson, Bryher, Ellerman 
Answer:
 person: Hilda Doolittle; person: Kenneth Macpherson; person: Bryher; person: Ellerman