Assertion: plumbeous vireo | /r/HasProperty | single species
Facets:
value: formerly
type: TEMPORAL
Source sentences:
text: The Plumbeous Vireo, the Blue-headed Vireo and the Cassin's Vireo were formerly considered a single species known as the Solitary Vireo.
text: This species, the Plumbeous Vireo, and Cassin's Vireo were formerly considered a single species known as the Solitary Vireo.