About: http://webisa.webdatacommons.org/251013885

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	According to the Portlet Specification, a portal is a web application that commonly provides personalization, single sign on, content aggregation from different sources, and hosts the presentation layer of information systems.
http://www.w3.org/ns/prov#wasQuotedFrom	oreilly.com