#line.common_carrier  a commercial organization serving as a common carrier
  supertype:  #common_carrier__carrier  a person or firm in the business of transporting people or goods or messages
  part of:  #transportation_system
  subtype:  #airline_business__airline__airway  a commercial enterprise that provides scheduled flights for passengers
  subtype:  #railway_system__railwaysystem__railway__railroad_line__railway_line__railwayline  line that is the commercial organization responsible for operating a railway system
     subtype:  #cable_railway__cablerailway__funicular__funicular_railway__funicularrailway  a railway up the side of a mountain pulled by a moving cable and having counterbalancing ascending and descending cars
     subtype:  #cog_railway__cograilway__rack_railway  railway for steep mountains; a cogwheel on the locomotive engages cogs on a center rail to provide traction
     subtype:  #metro__subway__tube__underground  electric underground railway
     subtype:  #monorail  a railway having a single track
     subtype:  #rail  short for railway; "he traveled by rail";1 "he was concerned with rail safety"
     subtype:  #scenic_railway  small railway in an amusement park
  subtype:  #steamship_company__steamshipcompany__steamship_line__steamshipline  a line responsible for the operation of a fleet of steamships
     subtype:  #fleet.steamship_company  a group of steamships operating together under the same ownership
        subtype:  #argosy  one or more large merchant ships
  subtype:  #transit_line__transitline  a line providing public transit
     subtype:  #bus_line__busline  an organization responsible for operating a bus transportation system
     subtype:  #trolley_line__trolleyline  a transit line using streetcars or trolley buses

No statement uses or specializes #line.common_carrier; click here to add one.