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Rach Gia Airport ( ) is an airport located in Rach Gia , Vietnam .
 Rach Gia, Rach Gia, 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:
 Rach Gia, Rach Gia, Vietnam