About: http://webisa.webdatacommons.org/30688306

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	For example, join is a logical operation, whereas nested loops joins" is a physical operator.Logical OperatorsLogical operators describe the relational algebraic operation used to process a statement.
http://www.w3.org/ns/prov#wasQuotedFrom	microsoft.com