About: http://webisa.webdatacommons.org/8506896

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	The problem with the test you are doing is that, perhaps not at all obviously, it is not meaningful for this kind of recommender / data.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com