About: http://webisa.webdatacommons.org/450269126

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	it is fine and safe to leave if branches empty, the only thing I would add is a comment:
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com