About: http://webisa.webdatacommons.org/80309545

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	If that kind of refactoring is not possible, like if you are working with a third-party API, another option to consider is a guard clause, like:
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com