About: http://webisa.webdatacommons.org/219681917

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	> cast unknown types to TEXT, however, if you try to do three or more UNIONs
http://www.w3.org/ns/prov#wasQuotedFrom	postgresql.org