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His 50th birthday in February was the occasion for massive celebrations , exceeded only by those for the 80th birthday of Kim Il-sung himself on 15 April that same year .
 person: Kim Il-sung
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 person: Kim Il-sung