85951
His first aspirations for social change were made apparent in his producing ( as a student ) a recently banned opera , " The Cradle Will Rock " , by Marc Blitzstein , about the disparity between the working and upper class .
 The Cradle Will Rock, Marc Blitzstein
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:
 The Cradle Will Rock, Marc Blitzstein