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Musical metamorphosis of thematic or motivic fragments characterize most of his works between the years 1950 and 1970 ; in this regard his music is similar to that written by Jean Sibelius earlier in the twentieth century .
 person: Jean Sibelius
Please list all entity words in the text that fit the category.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} 
Answer:
 person: Jean Sibelius