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In the 1960 s , Bill Russell and Wilt Chamberlain further transformed basketball by combining height with a greater level of athleticism than previous centers .
 person: Bill Russell; person: Wilt Chamberlain
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: Bill Russell, Wilt Chamberlain 
Answer:
 person: Bill Russell; person: Wilt Chamberlain