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The tale of the Gippsland big cat is closely related to similar tales of exotic carnivorous felines that have been reported for many decades in the Blue Mountains , west of Sydney , and commonly known as the Blue Mountains panther .
 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:
 Sydney