18577
After the Polish defeat in 1939 , the parts of Upper Silesia awarded to Poland after the First World War were reoccupied by Nazi Germany and added to the Gau Oberschlesien .
 Polish
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Polish