About: http://webisa.webdatacommons.org/276798440

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The signals are absorbed when propagating through more conducting materials, such as concrete walls, rock, etc.
http://www.w3.org/ns/prov#wasQuotedFrom	reference.com