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` ` Certainly what we know suggests that we should take what they ( North Korean officials ) are saying very seriously , ' ' he said at a news conference in Seoul .
 we, we, North Korean, Seoul, they ( North Korean officials, North Korean officials, he
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:
 we, we, North Korean, Seoul, they ( North Korean officials, North Korean officials, he