Assertion: gull's population | /r/HasProperty | separate subspecies
Facets:
value: formerly
type: TEMPORAL
Source sentences:
text: The legs are normally pink at all ages, but can be yellowish, particularly in the Baltic population, which was formerly regarded as a separate subspecies "L. a. omissus".
text: The legs are usually pink at all ages, but may be of yellow color, especially in the Baltic population, which was formerly considered as a separate subspecies “L.A. omissus”.