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Several of Canada 's largest companies are based in natural resource industries , such as Encana , Cameco , Goldcorp , and Barrick Gold .
 Canada, Encana, Cameco, Goldcorp, Barrick Gold
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Canada, Encana, Cameco, Goldcorp, Barrick Gold