Assertion: eider's plumage | /r/HasProperty | black
Facets:
value: in color
type: OTHER
value: predominantly
type: DEGREE
Source sentences:
text: The plumages are predominantly black in color.
text: Often called “sea swallows”, due to their shape and long tail streamers, Arctic terns are stunning little birds, with white and light-grey plumage, a black ‘cap’ on the head, and bright red beaks and feet.