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Yoo enlisted for mandatory military service on 5 March 2013 at Chuncheon , Gangwon-do for five weeks of basic training followed by 21 months as an active-duty soldier .
 Yoo, Chuncheon, Gangwon-do
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Yoo, Chuncheon, Gangwon-do