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After Tipper Gore heard her 11-year - old daughter Karenna listening to Prince 's song " Darling Nikki " ( which gained wide notoriety for its sexual lyrics and a reference to masturbation ) , she founded the Parents Music Resource Center .
 Tipper Gore, Karenna, Parents Music Resource Center
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Tipper Gore, Karenna, Parents Music Resource Center