<http://webisa.webdatacommons.org/43134974>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/43134974>	<http://www.w3.org/ns/prov#value>	"Other matrix materials (other than glass) can also be employed, such as polymers (e.g., PMMA)." .
<http://webisa.webdatacommons.org/prov/34248390>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/43134974> .
<http://webisa.webdatacommons.org/43134974>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<freepatentsonline.com> .