<http://webisa.webdatacommons.org/prov/449648233>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/168983731> .
<http://webisa.webdatacommons.org/168983731>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<alec.org> .
<http://webisa.webdatacommons.org/168983731>	<http://www.w3.org/ns/prov#value>	"(10) Silica is a naturally occurring mineral and is the second most common constituent of the earth???s crust." .
<http://webisa.webdatacommons.org/168983731>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .