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Ariella Vaccarino , Los Angeles , California , is an American singer , songwriter and singing teacher best known as for her roles on stage : La Boheme , The Wiz and Once Upon a Mattress , and on film : Nightmare on Elm Street VII , Highlander 3 and Jackson .
 Ariella Vaccarino, Los Angeles , California, American
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Ariella Vaccarino, Los Angeles , California, American