Assertion: airspace | /r/HasProperty | a flight information region
Facets:
Source sentences:
text: In air traffic control, an area control center (ACC), also known as a center or en-route center, is a facility responsible for controlling aircraft flying in a particular volume of airspace (a flight information region) at high altitudes between airport approaches and departures.
text: Each center is responsible for many thousands of square miles of airspace (known as a flight information region) and for the airports within that airspace.