About: http://webisa.webdatacommons.org/295395944

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	If Ruby is an option for you have a look at Hpricot which provides this feature; otherwise I guess you have to take that 'old' regex approach.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com