About: http://webisa.webdatacommons.org/269793239

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	Yes, exactly, if the validation is missing you get an error - a failing test is a sign you should change your code.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com