About: http://webisa.webdatacommons.org/172659207

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	I think it also works because many of us have had the experience of finding friends from college or high school (or perhaps even earlier) through Facebook or Google or other means, so there is a ring of familiarity to the ad.
http://www.w3.org/ns/prov#wasQuotedFrom	contemplativecomputing.org