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On Tuesday , South Korea staged a huge military parade to mark its armed forces ' 65th anniversary in a display of long-range missiles considered a direct threat to North Korea .
 South Korea, North Korea
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 South Korea, North Korea