<http://webisa.webdatacommons.org/prov/219396029>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/314532904> .
<http://webisa.webdatacommons.org/314532904>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/314532904>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<google.com> .
<http://webisa.webdatacommons.org/314532904>	<http://www.w3.org/ns/prov#value>	"In the preferred embodiment, the wavelength dispersive element is a grating, however." .