About: http://webisa.webdatacommons.org/261262186

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	You can use a tool such as jhat to find out where these references are sticking around.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com