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David Mills ( born 29 January 1929 , Moose Jaw , Saskatchewan ) is a Canadian bass , poet , composer and actor .
 Mills, Moose Jaw, Saskatchewan, Canadian
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Mills, Moose Jaw, Saskatchewan, Canadian