Assertion: swan's feather | /r/HasProperty | black
Facets:
value: in color
type: OTHER
Source sentences:
text: Their feathers are black in color with a line of white flight feathers on the edges of their wings.
text: As its name suggests this swan has black feathers.
text: They are covered in soft grey-brown feathers for the first three to four weeks of their lives before their black feathers begin to appear.