152619
In the U.K. " Mad Lad " was issued as the b-side of " Bye Bye Johnny " [ Fred Rothwell - ' Long Distance Information ' - Chuck Berry ` s Recorded Legacy ISBN 0 9519888 2 4 ] The Beatles had already several performances of songs written by Chuck Berry , where most John Lennon was the lead singer .
 Chuck Berry, Chuck Berry, John Lennon
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, Chuck Berry, John Lennon