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As he has consistently voted against the positions of the National Rifle Association , in 2002 he was given a performance rating of " F " , their lowest rating .
 National Rifle Association
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 National Rifle Association