About: http://webisa.webdatacommons.org/42107717

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	Furthermore, although this example concerns only JOIN operations, the VALTREE is also used to accelerate other types of database operations.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com