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Hepburn Heights bushland is the familiar name of a 53-hectare parcel of natural bushland and woodland in the northern suburbs of the city of Perth , Western Australia , a large portion of which was preserved from residential redevelopment after a determined six-year campaign by environmental activists ( November 1987 to June 1993 ) .
 Perth, Western Australia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Perth, Western Australia