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The Viperești oil field is an oil field located in Viperești , Buzău County .
 location: Viperești; location: Viperești; location: Buzău County
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: Viperești, Viperești, Buzău County 
Answer:
 location: Viperești; location: Viperești; location: Buzău County