<http://webisa.webdatacommons.org/prov/125717380> <http://www.w3.org/ns/prov#wasDerivedFrom> <http://webisa.webdatacommons.org/440081535> . <http://webisa.webdatacommons.org/440081535> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/ns/prov#Entity> . <http://webisa.webdatacommons.org/440081535> <http://www.w3.org/ns/prov#wasQuotedFrom> <econlib.org> . <http://webisa.webdatacommons.org/440081535> <http://www.w3.org/ns/prov#value> "This tax must be such as to raise the cost to us of those articles above what it would otherwise have been, or it cannot have the effect which it is intended to have???namely, of keeping out foreign produce." .