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Matthew Konan ( born September 3 , 1991 ) is an American professional ice hockey defenseman who currently plays for the Philadelphia Flyers of the National Hockey League ( NHL ) .
 American, Philadelphia Flyers, National Hockey League
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 American, Philadelphia Flyers, National Hockey League