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Assonance , where the use of similar vowel sounds within a word rather than similar sounds at the beginning or end of a word , was widely used in skaldic poetry but goes back to the Homeric epic .
 Homeric epic
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Homeric epic