About: http://webisa.webdatacommons.org/135316004

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	Shadowing occurs as the subscriber unit moves over uneven terrain, or travels into a propagation shadow behind a building or a hill or other obstacle much larger than the wave length of the frequency of the wireless channel.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com