#flight_line  place where airplanes are parked and the maintenance hangars (but not the runways or taxiways)
  supertype:  line.location  a spatial location defined by a real or imaginary unidimensional extent
  part of:  airfield__landing_field__landingfield__flying_field__field  a place where planes take off and land
     part of:  transportation_system__transportation__transit  facility consisting of the roads and equipment necessary for the movement of passengers or goods
        part of:  infrastructure__base  the stock of basic facilities and capital equipment needed for the functioning of a country or area; "the industrial base of Japan"

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