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C. Stephen Evans ( b. Atlanta , Georgia ) is an American historian and philosopher , he is one of the United States ' leading experts on Søren Kierkegaard having published six books on Kierkegaard over 25 years .
 C. Stephen Evans, Atlanta , Georgia, Søren Kierkegaard, Kierkegaard
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 C. Stephen Evans, Atlanta , Georgia, Søren Kierkegaard, Kierkegaard