<http://webisa.webdatacommons.org/prov/424461795>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/430797435> .
<http://webisa.webdatacommons.org/430797435>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<patents.com> .
<http://webisa.webdatacommons.org/430797435>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/430797435>	<http://www.w3.org/ns/prov#value>	"As a result, there is a need for a method and apparatus that produces light emission from photoluminescence gain mediums such as CaF.sub.2 thin films using electroluminescence." .