52854
After performing a fragment of " Papa Do n't Preach " , several dancers wearing tribal masks , surrounded Madonna , tied her up and proceeded to carry her to the center of the main stage just as the song 's opening riffs , underpinned by the dramatic sound of church bells with vocoder vocals , started to play in the background .
 Madonna
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Madonna