2539
As Polish momentum weakened , the Brigade was on September 13 ordered to withdraw across the Bzura near Brochow , continuously fighting the German 4th Mountain Division of General Georg Reinhardt .
 Polish, Brigade, Brochow
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, Brigade, Brochow