About: http://webisa.webdatacommons.org/120201128

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	A tag is a word or phrase that gets attached to an item--in this case, a bookmark--so you can search by the tag word rather than by part of the URL or a bookmark name.
http://www.w3.org/ns/prov#wasQuotedFrom	pcadvisor.co.uk