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This was a style introduced by Pietro Mascagni 's " Cavalleria rusticana " and Ruggero Leoncavallo 's " Pagliacci " that came to dominate the world 's opera stages with such popular works as Giacomo Puccini 's " La bohème " , " Tosca " , and " Madama Butterfly " .
 Pietro Mascagni, Cavalleria rusticana, Ruggero Leoncavallo, Pagliacci, Giacomo Puccini, La bohème, Tosca, Madama Butterfly
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:
 Pietro Mascagni, Cavalleria rusticana, Ruggero Leoncavallo, Pagliacci, Giacomo Puccini, La bohème, Tosca, Madama Butterfly