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On the ski slopes Christian Hummer edged fellow Norwegian Biarka Engenvick after a thrilling duel down the stretch of a World Cup Nordic combined ski sprint event in Norway Friday .
 Christian Hummer, Norwegian, Biarka Engenvick, World Cup Nordic, Norway, Friday
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: date, organization, person, geographical social political, national religious political, facility, cardinal, location, work of art, law, event, product, ordinal, percent, time, quantity, money, language 
Text: {0} 
Answer:
 Christian Hummer, Norwegian, Biarka Engenvick, World Cup Nordic, Norway, Friday