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Bettina Gruber ( born January 31 , 1985 ) is a Swiss cross country skier who has competed since 2002 .
 Bettina Gruber, Swiss
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bettina Gruber, Swiss