About: http://webisa.webdatacommons.org/324977352

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	operators, such as selection, projection, join, product, sum, intersect, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	sbql.pl