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Ramon S. Fernandez is generally regarded as the greatest basketball player ( and certainly the best and most revolutionary player at the center position ) produced by the Philippine Basketball Association .
 Ramon, Fernandez, basketball, Philippine Basketball Association
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ramon, Fernandez, basketball, Philippine Basketball Association