Assertion: wagtail's wing | /r/HasProperty | gray-black
Facets:
value: back
type: OTHER
value: with two white bars
type: OTHER
value: with large white patches
type: OTHER
Source sentences:
text: The wings are gray-black with two white bars and large white patches, visible when spread.
text: The similar grey wagtail also has a yellow belly, but has a grey back and black wings.