About: http://webisa.webdatacommons.org/5438367

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	For custom types or objects, things are a little bit trickier: you have to make sure to implement rich comparison methods to get bisect to compare correctly.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com