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Rampart Canyon , Rampart Gorge , Lower Ramparts , and The Ramparts all are names for a high-banked canyon of the Yukon River located downstream of Rampart , Alaska and upstream of Tanana , Alaska .
 Alaska, Tanana, Alaska
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Alaska, Tanana, Alaska