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Luninets became part of Poland in 1920 following the Polish-Soviet War , but nineteen years later was incorporated back into the Soviet Union in 1939 , and — with the exception of occupation by Nazi Germany from 1941 to 1944 — remained part of the Soviet Union until 1991 , at which time sovereignty ceded to the Republic of Belarus .
 Luninets, Poland, Soviet Union, Nazi Germany, Belarus
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Luninets, Poland, Soviet Union, Nazi Germany, Belarus