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Naturally , Muhammad is considered to be the authority on interpretation of the Qur ' an in any form , but his interpretations , even when discussing esoteric matters , are actually standard definition s of Qur ' anic concepts due to his position as prophet of Islam .
 Muhammad
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Muhammad