Assertion: petrel's head | /r/HasProperty | black
Facets:
Source sentences:
text: It has a black head and neck, and a white belly, breast, and its underwing is white with a black border.
text: The head of P. magellani is black, bordered by a contrasting white that leads into a distinctive white crescent extending up towards the back of the neck .
text: The head, neck and mantle of the Cape petrel are black; the lower back, base of the upperwing and rump are white, heavily chequered with black, whilst the outer upperwings are black with broad white patches near the body and beyond the bend in the wing.