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The concert ends with an extended performance by Chuck Berry , who at the time was enjoying major chart success in Britain and the US with his " My Ding-a-Ling " ( although he does not perform that song in this film ) .
 Chuck Berry
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Chuck Berry