2752
In Seoul , South Korean President Roh Moo - hyun said his government has no ` ` clear proof ' ' to conclude North Korea has nuclear weapons .
 Seoul, South Korean, his government, North Korea, South Korean President, South Korean President Roh Moo - hyun, his, 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:
 Seoul, South Korean, his government, North Korea, South Korean President, South Korean President Roh Moo - hyun, his, nuclear weapons