<http://webisa.webdatacommons.org/25107133>	<http://www.w3.org/ns/prov#value>	"composition is purified to remove substantially all oxygen and other trace elements which would contaminate the ribbon being rolled." .
<http://webisa.webdatacommons.org/prov/446759636>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/25107133> .
<http://webisa.webdatacommons.org/25107133>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/25107133>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<patents.com> .