Assertion: airspace | /r/HasProperty | restricted
Facets:
value: from ground level
type: LOCATION
value: from surface
type: LOCATION
Source sentences:
text: Their decisions resulted in the cancellations of flights at airports across the world, not only in those countries where airspace was restricted.
text: When both these areas are active the airspace is restricted from surface to 'unlimited'.
text: It is also favored for this purpose due to its proximity to Edwards Air Force Base, where the airspace is restricted from ground level to an unlimited height, and where there is a supersonic corridor.
text: When referring specifically to the airspace around Area 51 that is restricted, military personnel often use the term R-4808N or in less formal settings: