<http://webisa.webdatacommons.org/202577481>	<http://www.w3.org/ns/prov#value>	"re: some systems, such as bridges, should be hard to break." .
<http://webisa.webdatacommons.org/202577481>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<econlib.org> .
<http://webisa.webdatacommons.org/prov/388514100>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/202577481> .
<http://webisa.webdatacommons.org/202577481>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .