<http://webisa.webdatacommons.org/prov/104665786>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/312206646> .
<http://webisa.webdatacommons.org/prov/459514502>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/312206646> .
<http://webisa.webdatacommons.org/312206646>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<patents.com> .
<http://webisa.webdatacommons.org/312206646>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/312206646>	<http://www.w3.org/ns/prov#value>	"therefore be advantageously constructed of platinum, gold, carbons or other materials which are effective for this purpose." .