<http://webisa.webdatacommons.org/395298062>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<blogspot.com> .
<http://webisa.webdatacommons.org/prov/104267340>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/395298062> .
<http://webisa.webdatacommons.org/395298062>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/395298062>	<http://www.w3.org/ns/prov#value>	"This filter is presumably made of some sort of material that changes opacity depending on electrical current." .