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The band split into two in 1997 but the 21st century 's first decade saw the ( unofficially tagged ) NOM-Zhir and NOM-Euro gradually reintegrating , the official reunion concert having been held on the 20 April 2007 in SPB " Port " Club .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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