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In 2010 , Olds was accepted into the Pacific Opera Young Artist Programme and during his time there performed at The NSW Parliament House as well as singing the bass solo in Beethoven 's Symphony No. 9 at the Concourse Concert Hall in Chatswood , New South Wales with members of Opera Australia and The Sydney Symphony Orchestra .
 Pacific Opera, Beethoven 's, Wales, Opera Australia, 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:
 Pacific Opera, Beethoven 's, Wales, Opera Australia, Sydney