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The Merriam 's Elk ( Cervus canadensis merriami ) is an extinct subspecies of elk once found in the arid lands of the southwestern United States .
 location: United States
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: United States 
Answer:
 location: United States