#airfield__landing_field__landingfield__flying_field__field  a place where planes take off and land
  supertype:  installation__facility  a building or place that provides a particular service or is used for a particular industry; "the assembly plant is an enormous facility"
  subtype:  airport  airstrip  auxiliary_airfield
  part of:  transportation_system
  part:  apron.paved_surface  a paved surface where aircraft stand while not being used
  part:  runway  a strip of level paved surface where planes can take off and land
  part:  taxiway__taxi_strip  a paved surface in the form of a strip; used by planes taxiing to or from the runway at an airport
  part:  flight_line  place where airplanes are parked and the maintenance hangars (but not the runways or taxiways)

30 statements are about indirect instances of airfield: graph1_on_BA2053, graph1_on_FJ810_1, graph1_on_FJ810_2, graph1_on_FJ811_1, graph1_on_FJ811_2, graph1_on_QIF3019, graph1_on_QIF3020, graph1_on_QIF3021, graph1_on_QIF3022, graph1_on_QIF3025_1, graph1_on_QIF3025_2, graph1_on_QIF3026_1, graph1_on_QIF3026_2, graph1_on_QIF3041, graph1_on_QIF3042, graph1_on_QIF3051, graph1_on_QIF3052, graph1_on_QIF3057, graph1_on_QIF3061, graph1_on_QIF3062, graph1_on_QIF3718, graph1_on_QIF123_1, graph1_on_QIF123_2, graph1_on_QIF124, graph1_on_QIF139, graph1_on_QIF140, graph1_on_QIF174, graph1_on_QIF67_1, graph1_on_QIF67_2__graph1onqif672, graph1_on_QIF68
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