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Thereafter , the Pennsylvania Barge Club served as an administrative center for rowing , including serving as Headquarters for the National Association of Amateur Oarsmen , which later became USRowing .
 Pennsylvania Barge, National Association of Amateur Oarsmen, USRowing
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Pennsylvania Barge, National Association of Amateur Oarsmen, USRowing