3261
History 1920-1960 William Aberhart , prime minister in Alberta , was inspired of Major C.H. Douglas Social Credit-theory and tried to implement basic income already in the 1930s .
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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:
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