About: http://webisa.webdatacommons.org/61647242

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 biggest difference I see is that in this code, your inverse function decides how to respond to an error.
http://www.w3.org/ns/prov#wasQuotedFrom	sitepoint.com