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Vervins ( ) is a commune in the Aisne department in Picardy in northern France .
 Vervins, Aisne, Picardy, France
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Vervins, Aisne, Picardy, France