Assertion: gull's range | /r/HasProperty | western l. occidentalis
Facets:
Source sentences:
text: A few superficially similar dark-backed, fairly large gulls occur in the Pacific Ocean or in the tropics, all generally far outside this species' range, such as the slaty-backed (L. schistisagus), the western (L. occidentalis) and the kelp gull (L. dominicanus).