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North Korea demanded on Saturday that South Korea return a northern war veteran who has been in the South since the 1950-53 war , Seoul 's unification ministry said .
 location: South; location: Seoul; location: North Korea; location: South Korea
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 location: South; location: Seoul; location: North Korea; location: South Korea