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Groen was Mayor of Oldehove and Bunschoten , and a member of the provincial parliament of Groningen .
 Groen, Oldehove, Bunschoten, Groningen
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Groen, Oldehove, Bunschoten, Groningen