About: http://webisa.webdatacommons.org/159296636

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 introduces a safer way to deal with nulls and is very useful for primitive types that don???t generally allow null as one of their values, such as bool and int (using ?bool and ?int respectively).
http://www.w3.org/ns/prov#wasQuotedFrom	hacklang.org