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Donald Dean Summerville ( 1915 – November 19 , 1963 ) was an east-end municipal politician in Toronto , Canada , and served as Mayor of Toronto , briefly , until his death .
 Donald Dean Summerville, Toronto, Canada, Toronto
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Donald Dean Summerville, Toronto, Canada, Toronto