About: http://webisa.webdatacommons.org/232256608

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 are right, the notation was a bit sloppy, I updated the answer with a simpler solution that keeps your original notation.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com