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The album reached its peak of number five in July 2006 due to the popularity of the single " Unfaithful " and it has so far sold almost 600,000 copies in the United Kingdom .
 United Kingdom
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 United Kingdom