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Manetho also writes that he was succeeded by an unknown king named Nekauba at Sais .
 Manetho, Nekauba, Sais
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Manetho, Nekauba, Sais