89769
The treaty defines nuclear-weapon states as those that have built and tested a nuclear explosive device before 1 January 1967 ; these are the United States , Russia , the United Kingdom , France , and China .
 United States, Russia, United Kingdom, France, China
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 United States, Russia, United Kingdom, France, China