About: http://webisa.webdatacommons.org/225832047

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	This indeed is not an easy question to answer, but ... in this book there is a summary, some key words ...
http://www.w3.org/ns/prov#wasQuotedFrom	booklad.org