About: http://webisa.webdatacommons.org/182154643

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	However, GPS signals do not reach into places such as large buildings, basements and sewer systems, and some nations have developed electronic countermeasures that can jam GPS transmissions.
http://www.w3.org/ns/prov#wasQuotedFrom	afcea.org