About: http://webisa.webdatacommons.org/387393656

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	Heffter???s article says that not every problem is a special case, but may be a problem that is "central to the very nature of the requirements process.
http://www.w3.org/ns/prov#wasQuotedFrom	docstoc.com