Assertion: white pelican | /r/HasProperty | sister species
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Source sentences:
text: In 1990, Charles Sibley and John E. Ahlquist's Unweighted Pair Group Method with Arithmetic Mean (UPGMA) tree based on DNA–DNA hybridization data found that the American white pelican, the pink-backed pelican, the great white pelican, and the Australian pelican were sister species, and the brown pelican was the most divergent of all.