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Led by their Kosh ataman Osip Gladky , some of the Cossacks , chose to defect to Russia , where they were pardoned by Nicholas I in 1828 .
 organization: Cossacks; location: Russia; person: Nicholas I
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: Cossacks, Russia, Nicholas I 
Answer:
 organization: Cossacks; location: Russia; person: Nicholas I