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Then , the George Mikan and the Bob Kurland pioneered as exceptionally tall centers , shattering the widely held perception that tall players could not develop the agility and coordination to play basketball well , and ushering in the role of the dominant big man .
 George Mikan, Bob Kurland
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 George Mikan, Bob Kurland