About: http://webisa.webdatacommons.org/255699275

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	Before 1978, copyright was an opt-in system, granting protection only to those who registered and renewed their copyright, and only if they marked their creative work with the famous ??.
http://www.w3.org/ns/prov#wasQuotedFrom	remixtheory.net