About: http://webisa.webdatacommons.org/116213268

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	.. then updates or deletes in the referenced table will blow up with an error if there is a corresponding row in the referencing table.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com