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Looking further into the story behind Bernstein , Ressler and Strome found that despite a massive contribution to music , which included Bernstein 's invention of the stadium concert with the 1965 Shea Stadium Concert , the benefit concert , multiple Beatles reunion attempts , and his organizing of some of the first mixed-race rock concerts in America , Bernstein had been left virtually broke .
 Bernstein, Bernstein, Bernstein
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bernstein, Bernstein, Bernstein