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As a supporter of the Republican Reichsbanner Schwarz-Rot-Gold his times in office were marked by fierce conflicts with the rising forces of the Communists and the Nazi Party .
 Reichsbanner Schwarz-Rot-Gold, Communists, Nazi Party
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Reichsbanner Schwarz-Rot-Gold, Communists, Nazi Party