#zone.geographical_area  a circumscribed geographical region characterized by some distinctive features
  supertype:  #geographical_area__geographic_area__geographical_region__geographic_region  a demarcated area of the Earth
  subtype:  #island.zone  a zone or area resembling an island
     subtype:  #traffic_island__trafficisland__safety_island__safety_isle__safety_zone  an island area in a roadway from which traffic is excluded; provides safe area for pedestrians

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