About: http://webisa.webdatacommons.org/421737460

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	And second, he says, Menger's definition of his conception is not definite enough, and leaves room for all sort of things that have not the character of economical goods, such, for instance, as useful technical knowledge.
http://www.w3.org/ns/prov#wasQuotedFrom	econlib.org