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` ` South Korea and the United States share a firm principle that North Korea should never possess nuclear weapons and that the issue should be resolved through a peaceful manner , ' ' he said .
 South Korea, the United States, North Korea, he, nuclear weapons
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: organization, person, geographical social political, vehicle, location, weapon, facility 
Text: {0} 
Answer:
 South Korea, the United States, North Korea, he, nuclear weapons