About: http://webisa.webdatacommons.org/6766350

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	In case you are wondering, you can use the defined() built-in to test if an element is undefined, namely:
http://www.w3.org/ns/prov#wasQuotedFrom	att.com