<http://webisa.webdatacommons.org/311759328>	<http://www.w3.org/ns/prov#value>	"d silica mixed with oxides of, for example, potassium, calcium, barium or lead; other various ceramics such as boron nitride, silicon carbide, and sapphire." .
<http://webisa.webdatacommons.org/prov/231450254>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/311759328> .
<http://webisa.webdatacommons.org/311759328>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/311759328>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.es> .