About: http://webisa.webdatacommons.org/15202383

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	There are special cases where you can cheat and use (a==b) safely, e.g. if you know that both Strings are interned (and therefore value identity implies object identity).
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com