About: http://webisa.webdatacommons.org/98804836

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	This will work with any class that defines the to_mongo class method, which means you can use it with custom types as well.
http://www.w3.org/ns/prov#wasQuotedFrom	railstips.org