Assertion: trumpeter swan | /r/HasProperty | same species
Facets:
value: by some authorities
type: OTHER
Source sentences:
text: It is the North American counterpart and a close relative of the Whooper Swan of Eurasia, and even has been considered the same species by some authorities.
text: It is the American counterpart and a close relative of the whooper swan of Eurasia, and even has been considered the same species by some authorities.