About: http://webisa.webdatacommons.org/130815641

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	Organize the backend classes so they are self-contained (i.e. not try to guess which type they are at runtime; if you already loaded a backend no need to recheck whether a feature is available or not.)
http://www.w3.org/ns/prov#wasQuotedFrom	php.net