About: http://webisa.webdatacommons.org/183447887

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	Correlated subquery references a column in the outer query and executes the subquery once for every row in the outer query;and the EXISTS operator is used to test whether the relationship or link is present.
http://www.w3.org/ns/prov#wasQuotedFrom	tutorialspoint.com