57843
The twelve countries that had significant interests in Antarctica at the time were : Argentina , Australia , Belgium , Chile , France , Japan , New Zealand , Norway , South Africa , the Soviet Union , the United Kingdom , and the United States .
 Antarctica, Argentina, Australia, Belgium, Chile, France, Japan, New Zealand, Norway, South Africa, Soviet Union, United Kingdom, United States
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Antarctica, Argentina, Australia, Belgium, Chile, France, Japan, New Zealand, Norway, South Africa, Soviet Union, United Kingdom, United States