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The Case of the Disappearing Diamonds is a World in Action documentary film which reported on how billions of pounds-worth of gem diamonds were stripped from South West Africa ( Namibia ) over a 20-year period by the world 's largest diamond mining company .
 location: Namibia
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
 Entities: Namibia 
Answer:
 location: Namibia