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Li also told Kelly that North Korea had gone ahead with reprocessing 8 , 000 spent fuel rods at its Yongbyon plant , which could produce enough weapons grade plutonium for several more nuclear bombs , said the sources who requested anonymity .
 North Korea, its, Yongbyon, Li, Kelly, the sources, who, its Yongbyon plant, which, weapons, several more nuclear bombs, nuclear
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:
 North Korea, its, Yongbyon, Li, Kelly, the sources, who, its Yongbyon plant, which, weapons, several more nuclear bombs, nuclear