About: http://webisa.webdatacommons.org/419432138

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	During constraint solving (??14.6), the constraint type : not struct is met if type is a reference type.
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.com