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Oliver Robert Gould ( April 4 , 1874 – October 7 , 1951 ) was a farmer and political figure in Saskatchewan , Canada .
 person: Oliver; person: Gould; location: Saskatchewan
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: Oliver, Gould, Saskatchewan 
Answer:
 person: Oliver; person: Gould; location: Saskatchewan