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He is a member of the ChristianUnion party , a socially conservative Protestant party , and was formerly a member of the Reformatory Political Federation ( RPF ) , which merged with the Reformed Political League ( GPV ) to form the ChristianUnion .
 ChristianUnion, Reformatory Political Federation, 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:
 ChristianUnion, Reformatory Political Federation, Reformed Political League, ChristianUnion