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In the assessment , which they have shared with Japan , South Korea and other allies in recent weeks , officials at the Central Intelligence Agency said that U . S . satellites have identified a sophisticated new nuclear testing site in an area called Youngdoktong .
 Japan, South Korea, other allies, U . S, the Central Intelligence Agency, they, officials at the Central Intelligence Agency, U . S . satellites, a sophisticated new nuclear testing site in an area called Youngdoktong, an area called Youngdoktong, Youngdoktong
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:
 Japan, South Korea, other allies, U . S, the Central Intelligence Agency, they, officials at the Central Intelligence Agency, U . S . satellites, a sophisticated new nuclear testing site in an area called Youngdoktong, an area called Youngdoktong, Youngdoktong