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The 1962 Saskatchewan Doctors ' Strike was a 23-day labour action exercised by medical doctor s in the Canadian province of Saskatchewan in an attempt to force the Co-operative Commonwealth Federation government of Saskatchewan to rescind its program of universal medical insurance .
 Saskatchewan, Saskatchewan, Co-operative Commonwealth Federation, Saskatchewan
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Saskatchewan, Saskatchewan, Co-operative Commonwealth Federation, Saskatchewan