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Richard Aaron Bell ( born May 3 , 1967 ) is a former American football player who played a single season in the NFL with the Pittsburgh Steelers .
 Bell, NFL, Pittsburgh Steelers
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bell, NFL, Pittsburgh Steelers