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He continued as a member of the Opera Australia Chorus up until 2012 where he performed in 9 operas - finishing with Verdi 's La Traviata on Sydney Harbour .
 Opera Australia, Verdi 's, Sydney
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Opera Australia, Verdi 's, Sydney