<http://webisa.webdatacommons.org/prov/461694049>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/401816484> .
<http://webisa.webdatacommons.org/401816484>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/401816484>	<http://www.w3.org/ns/prov#value>	"This parabolic reflecting surface can be formed of, e.g., metallized, cast polystyrene, or other suitable material." .
<http://webisa.webdatacommons.org/401816484>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .