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In 1865 he bought a team of horses from Creighton and started his own freighting business , operating between Omaha and Denver until 1867 .
 person: Creighton; location: Omaha; location: Denver
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: Creighton, Omaha, Denver 
Answer:
 person: Creighton; location: Omaha; location: Denver