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The 1921 Census was the sixth comprehensive decennial census since the Confederation process forming the federal Dominion of Canada on 1 July 1867 .
 organization: Dominion
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 organization: Dominion