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Krystian Trochowski ( born 10 November 1985 ) is a retired German international rugby union player , formerly playing for the Berliner RC in the Rugby-Bundesliga and the German national rugby union team .
 Krystian Trochowski, German, rugby union, German national rugby union team
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Krystian Trochowski, German, rugby union, German national rugby union team