About: http://webisa.webdatacommons.org/451249334

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	Another example of validation of the semantics involves verifying that for every attribute that has been defined as a variable, there is a service which changes the value of that attribute.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com