<http://webisa.webdatacommons.org/prov/488439731>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/452820319> .
<http://webisa.webdatacommons.org/452820319>	<http://www.w3.org/ns/prov#value>	"When he was finally exasperated with me he wrote that Economics is an art not a science." .
<http://webisa.webdatacommons.org/452820319>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/452820319>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wordpress.com> .