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Taxonomy is very fluid in the age of DNA analysis , so other arrangements may be found , as in Sibley-Ahlquist taxonomy .
 Sibley-Ahlquist
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sibley-Ahlquist