<http://webisa.webdatacommons.org/172485306>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/332533331>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/172485306> .
<http://webisa.webdatacommons.org/172485306>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/172485306>	<http://www.w3.org/ns/prov#value>	"A metal film having high reflectivity such as Al and Cr was used to form the mirror." .