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The Chattahoochee River National Recreation Area , in the northwestern corner of the city , preserves a stretch of the river for public recreation opportunities .
 Chattahoochee River National Recreation Area
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Chattahoochee River National Recreation Area