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As a devout Roman Catholic , together with other worldwide Catholic performers as well-known singer Khánh-Ly , famous MC Nguyễn Ngọc Ngạn , Ngoc Bich Ngan has participated as a volunteer singer and worker at World Youth Day from July 24 – 27 , 2002 , to welcome Pope John Paul II to Toronto , Canada .
 Roman Catholic, Khánh-Ly, Nguyễn Ngọc Ngạn, Ngoc Bich Ngan, John Paul II, Toronto , Canada
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Roman Catholic, Khánh-Ly, Nguyễn Ngọc Ngạn, Ngoc Bich Ngan, John Paul II, Toronto , Canada