About: http://webisa.webdatacommons.org/415359347

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	Some boxes (e.g. non-single predicate join constructs such as GROUP BY, UNION, AND OUTER-JOIN) cannot be modified by creating additional tables to provide their inputs.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com