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Grigorij Kuzmin ( 08.04.1917 - 22.04.1988 ) is a notable Estonia n astronomer who worked mainly in the field of stellar dynamics .
 person: Grigorij Kuzmin
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: Grigorij Kuzmin 
Answer:
 person: Grigorij Kuzmin