About: http://webisa.webdatacommons.org/268892760

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	In these examples, the name of the stack is a parameter, and upvar is used to convert that into the data used for the stack.
http://www.w3.org/ns/prov#wasQuotedFrom	gibmonks.com