24772
Some countries , such as the former Soviet Union , Spain , and the United Kingdom , among others , are held to be unions of several " nations " by various definitions .
 Soviet Union, Spain, United Kingdom
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Soviet Union, Spain, United Kingdom