About: http://webisa.webdatacommons.org/300475928

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	Any of the four default types can be exempted from defaulting to the DEFAULT value by supplying a value of undef:
http://www.w3.org/ns/prov#wasQuotedFrom	cpan.org