About: http://webisa.webdatacommons.org/291476242

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	???You could also use Code Contracts to make things even more explicit.??? But using types instead of contracts is more explicit still and gives better compiler support.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com