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He had two stints with the Boston Celtics ( 1968 – 1975 , and 1977 – 1980 ) , for which he is most noted .
 organization: Boston Celtics
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:
 organization: Boston Celtics