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The southern part of the Weser Depression belongs to the state of North Rhine-Westphalia , with its towns of Minden and Petershagen .
 North Rhine-Westphalia, Minden, Petershagen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 North Rhine-Westphalia, Minden, Petershagen