About: http://webisa.webdatacommons.org/285996797

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	Helicopter pilots need authorization from the Heli control center to enter or leave this zone, providing information such as destination and timing.
http://www.w3.org/ns/prov#wasQuotedFrom	aviationtoday.com