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Frederick Roger Heron ( October 6 , 1944 – December 28 , 2010 ) was a professional American football defensive lineman in the National Football League .
 Heron, National Football 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:
 Heron, National Football League