About: http://webisa.webdatacommons.org/267968754

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Since that time, mostly in the 1970s, the birding community has become more adept at IDing gulls and we have since added Western, Slaty-backed and Kelp and possibly Yellow-legged -- all dark-backed gulls.
http://www.w3.org/ns/prov#wasQuotedFrom	thebirdist.com