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It comprises 159.7 acres ( 64.63 hectares ) of city park land that has been officially designated as " Washington Park " by the City of Portland , as well as the adjacent 64 acre Oregon Zoo and the 187 acre Hoyt Arboretum , which together make up the area described as " Washington Park " on signs and maps .
 Portland, Oregon
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Portland, Oregon