About: http://webisa.webdatacommons.org/417581642

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 the aircraft field, the need for devices which will aid in the prevention of collisions between aircraft and between aircraft and stationary obstructions such as mountainous terrain and tall towers has become well recognized.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com