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Originally a Viking fishing village established in the 10th century in the vicinity of what is now Gammel Strand , Copenhagen became the capital of Denmark in the early 15th century .
 Gammel Strand, 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:
 Gammel Strand, Copenhagen, Denmark