65399
It is traditionally included with the stiff-tailed duck subfamily Oxyurinae , but appears to be only distantly related to the genus " Oxyura " , and its peculiar apomorphies make it difficult to place .
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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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