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An argument proposed by Bruce Friedrich , also a protectionist , holds that strict adherence to veganism harms animals , because it focuses on personal purity , rather than encouraging people to give up whatever animal products they can .
 Bruce Friedrich
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Bruce Friedrich