<http://webisa.webdatacommons.org/381818670>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/381818670>	<http://www.w3.org/ns/prov#value>	"impurities, including copper, perhaps some chloride, and other materials." .
<http://webisa.webdatacommons.org/381818670>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<patents.com> .
<http://webisa.webdatacommons.org/prov/59832152>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/381818670> .