Assertion: albatross's underwing | /r/HasProperty | yellow wash
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Source sentences:
text: Similar species include Black-footed Albatross (P. nigripes), which has a uniformly sooty plumage and the much rarer Short-tailed Albatross (P. albatrus), which has a larger, heavier bill, all white underwings, a yellow wash on the nape and a white back.