<http://webisa.webdatacommons.org/prov/354199273>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/232580027> .
<http://webisa.webdatacommons.org/232580027>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/232580027>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wsppn.org> .
<http://webisa.webdatacommons.org/232580027>	<http://www.w3.org/ns/prov#value>	"PCBs were widely used before 1979 as dielectric fluid to insulate electrical equipment such as capacitors, transformers, switches, and voltage regulators, and for fluorescent lamp ballasts." .