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Finland 's trade surplus rose to 3.83 billion markka in April from 3.43 billion in March , the National Customs Board ( NCB ) said in a statement on Thursday .
 National Customs Board, NCB, Finland
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, else, organization, person 
Text: {0} 
Answer:
 National Customs Board, NCB, Finland