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The term has also been applied to modern stories revolving around Christian themes and motifs , such as the writings of C. S. Lewis , J. R. R. Tolkien , Madeleine L'Engle , and George MacDonald .
 C. S. Lewis, J. R. R. Tolkien, Madeleine L'Engle, George MacDonald
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. S. Lewis, J. R. R. Tolkien, Madeleine L'Engle, George MacDonald