<http://webisa.webdatacommons.org/prov/227810569>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/317915280> .
<http://webisa.webdatacommons.org/317915280>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/317915280>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<faqs.org> .
<http://webisa.webdatacommons.org/317915280>	<http://www.w3.org/ns/prov#value>	"layer 4 is a portion which confines light and enables propagation of" .