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Einarr 's other preserved works are poems on Bishop Guðmundr Arason which have come down to us in Guðmundar saga by Arngrímr Brandsson .
 Einarr, Guðmundr Arason
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Einarr, Guðmundr Arason