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In contrast , the White Nile provides only 10 % of the Nile 's waters during the high-water season but contributes more than 80 % during the low-water period .
 White Nile, Nile
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 White Nile, Nile