Assertion: gull's back | /r/HasProperty | dark outer primaries
Facets:
Source sentences:
text: Slaty-backed Gull: This large gull has a slate-gray back, white head, belly, tail, and upper wings; dark outer primaries separated from mantle by row of white spots.
text: Slaty-backed Gull: This large gull has a slate-gray back, white head, belly, tail, and upper wings; dark outer primaries separated from mantle by row of white spots.
text: Slaty-backed Gull: This large gull has a slate-gray back, white head, belly, tail, and upper wings; dark outer primaries separated from mantle by row of white spots.