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Joe Sheehan from " Baseball Prospectus " wrote that the commission has been focusing " blame for the era exclusively on uniformed personnel " , and failing to investigate any role played by team ownership and management .
 Joe Sheehan, Baseball Prospectus
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Joe Sheehan, Baseball Prospectus