About: http://webisa.webdatacommons.org/34307567

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	When traversing the tree, you might want to skip some node types such as comment or DTD declarations: to do so, you can specify which node type should be skipped:xb.skip_pi(); // skips pi declaration,
http://www.w3.org/ns/prov#wasQuotedFrom	codeproject.com