<http://webisa.webdatacommons.org/prov/454013911>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/317335473> .
<http://webisa.webdatacommons.org/317335473>	<http://www.w3.org/ns/prov#value>	"Also, an electric field is easily insulated and shielded, but magnetism penetrates anything, including metal, lead, steel, concrete ??? and human skin." .
<http://webisa.webdatacommons.org/317335473>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/317335473>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<wordpress.com> .