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The Ritmo di Sant ' Alessio or Ritmo marchigiano su Sant ' Alessio is a late twelfth-century metrical vita of the legendary saint Alexius of Rome composed for public performance by an anonymous giullare .
 Alexius of Rome
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Alexius of Rome