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Kateřina Dudková ( born 1988 ) is a professional Czech triathlete , Czech U23 vice champion of the year 2009 and member of the young Czech elite team .
 Kateřina Dudková, Czech, Czech, Czech
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Kateřina Dudková, Czech, Czech, Czech