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In June 1940 , the Soviet Union forcibly annexed Estonia , Latvia and Lithuania , and the disputed Romanian regions of Bessarabia , northern Bukovina and Hertza .
 Soviet Union, Estonia, Latvia, Lithuania, Bessarabia, Bukovina, Hertza
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, Estonia, Latvia, Lithuania, Bessarabia, Bukovina, Hertza