About: http://webisa.webdatacommons.org/378203483

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	In complex urban environments, acoustic signals often experience reflections, refraction, and complete blockage from buildings and other objects, resulting in missing or misleading signals at sensors.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca