About: http://webisa.webdatacommons.org/147969487

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	This is called nesting, and since a subquery is a SELECT statement, you can also nest a subquery inside another subquery.
http://www.w3.org/ns/prov#wasQuotedFrom	microsoft.com