Assertion: pink backed pelican | /r/HasProperty | sister species
Facets:
value: by andrew elliott
type: OTHER
value: in 1992
type: TEMPORAL
Source sentences:
text: The spot-billed pelican and the pink-backed pelican were considered to be sister species by Andrew Elliott in 1992 and Joseph B. Nelson in 2005, and the divergence between the brown and the Peruvian pelicans was found to be the most in the pelican family.