About: http://webisa.webdatacommons.org/68939115

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	Non-terminals in a pattern may appear with subscripts (e.g. Expr1, Expr2) to distinguish different instances of the same sort of pattern.
http://www.w3.org/ns/prov#wasQuotedFrom	w3.org