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Christian IV 's Arsenal ( Danish : Christian IV 's Tøjhus ) , is a historic building on Slotsholmen in central Copenhagen , Denmark .
 IV, IV, Copenhagen, Denmark
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 IV, IV, Copenhagen, Denmark