<http://webisa.webdatacommons.org/6460840>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<drexel.edu> .
<http://webisa.webdatacommons.org/6460840>	<http://www.w3.org/ns/prov#value>	"An economic factor would be the cost because it much cheaper than other suitable materials such as steel." .
<http://webisa.webdatacommons.org/prov/294561178>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/6460840> .
<http://webisa.webdatacommons.org/6460840>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .