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J. R. R. Tolkien believed that the poem retains too genuine a memory of Anglo-Saxon paganism to have been composed more than a few generations after the completion of the Christianisation of England around AD 700 , and Tolkien 's conviction that the poem dates to the 8th century has been defended by Tom Shippey , Leonard Neidorf , Rafael J. Pascual , and Robert D. Fulk , among others .
 J. R. R. Tolkien, Tolkien, Tom Shippey, Leonard Neidorf, Rafael J. Pascual, Robert D. Fulk
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 J. R. R. Tolkien, Tolkien, Tom Shippey, Leonard Neidorf, Rafael J. Pascual, Robert D. Fulk