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Over an 18-month period , Greyhound briefly opened 33 delivery - only restaurants , using Columbus , Ohio as a test market .
 location: Columbus , Ohio
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: Columbus , Ohio 
Answer:
 location: Columbus , Ohio