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In June 1937 he was imprisoned on the orders of Joseph Stalin in Tbilisi a month after his son 's birth .
 person: Joseph Stalin; location: Tbilisi
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
 Entities: Joseph Stalin, Tbilisi 
Answer:
 person: Joseph Stalin; location: Tbilisi