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Tống Bình ( chữ Hán : 宋平 ) was a historical administrative district of Giao Chỉ , equivalent to modern Hanoi , under first the Sung Dynasty then the Tang Dynasty during the third Chinese domination of Tonkin , or what is today northern Vietnam .
 Hanoi, Vietnam
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hanoi, Vietnam