2865
North Korea has never tested a nuclear weapon , though the CIA long ago estimated that it manufactured two crude devices in the late 1980s or early 1990s .
 North Korea, it, the CIA, a nuclear weapon, two crude devices
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, it, the CIA, a nuclear weapon, two crude devices