About: http://webisa.webdatacommons.org/188701240

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	Solid objects such as trees and buildings usually weaken or completely block LOS propagation.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.com