<http://webisa.webdatacommons.org/158457586>	<http://www.w3.org/ns/prov#wasQuotedFrom>	<slideshare.net> .
<http://webisa.webdatacommons.org/158457586>	<http://www.w3.org/ns/prov#value>	"metal and other building materials have a direct impact on signal propagation" .
<http://webisa.webdatacommons.org/158457586>	<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>	<http://www.w3.org/ns/prov#Entity> .
<http://webisa.webdatacommons.org/prov/292035064>	<http://www.w3.org/ns/prov#wasDerivedFrom>	<http://webisa.webdatacommons.org/158457586> .