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The richest parts of the property to the north and south of the central region have been estimated by Bre-X to contain 57 million ounces of gold .
 organization: Bre-X
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 organization: Bre-X