Assertion: owl's plumage | /r/HasProperty | gray
Facets:
Source sentences:
text: Owls have brown, gray, or white plumage with streaks or spots.
text: The plumage is greyish-brown, spotted, streaked and barred with white.
text: The female snowy owls have gray plumage, while you can see all white body on the male snowy owls.