About: http://webisa.webdatacommons.org/247913757

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	it was asked in way back 2010 and now there are lot of sample there including your sample
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com