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Lubertus Cornelis ( Bert ) Groen ( born March 28 , 1945 in Haarlem ) is a Dutch corporate director and former civil servant and politician of the Reformed Political League ( GPV ) and his successor the ChristianUnion ( ChristenUnie ) .
 Bert, Groen, Haarlem, Dutch, Reformed Political League, ChristianUnion
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bert, Groen, Haarlem, Dutch, Reformed Political League, ChristianUnion