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The capital of the Dilmun civilization , Dilmun was , according to the Epic of Gilgamesh , the " land of immortality " , the ancestral place of Sumerians and a meeting point of gods .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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