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Major nuclear disarmament groups include Campaign for Nuclear Disarmament , Greenpeace and International Physicians for the Prevention of Nuclear War .
 Campaign for Nuclear Disarmament, Greenpeace, International Physicians for the Prevention of Nuclear War
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Campaign for Nuclear Disarmament, Greenpeace, International Physicians for the Prevention of Nuclear War