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Several stores refused to stock their recordings , provoking debate about censorship in rock music ; in the mid-1980 s , vocalist and primary lyricist Jello Biafra became an active campaigner against the Parents Music Resource Center .
 Jello Biafra, Parents Music Resource Center
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Jello Biafra, Parents Music Resource Center