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In Arkhangelsk , Yury Koval met Boris Shergin , a Russian Pomor writer , and became interested in Russian folklore .
 location: Arkhangelsk; person: Boris Shergin
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: Arkhangelsk, Boris Shergin 
Answer:
 location: Arkhangelsk; person: Boris Shergin