About: http://webisa.webdatacommons.org/150163678

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	Jasper shows how contracts work for abstract types and interfaces -- June 6, 2010
http://www.w3.org/ns/prov#wasQuotedFrom	microsoft.com