About: http://webisa.webdatacommons.org/244887009

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	NER, LEFT OUTER, RIGHT OUTER, FULL OUTER, and CROSS join operators.UNION and JOIN within a FROM clause are supported within views and in derived tables and subqueries.A self-join is a table that is joined to itself.
http://www.w3.org/ns/prov#wasQuotedFrom	microsoft.com