#passenger__rider  a traveler riding in a vehicle (a boat or bus or car or plane or train etc) who is not operating it
  supertype:  #traveler__traveller  a person who changes location
  subtype:  #commuter  someone who travels regularly from home in a suburb to work in a city
     subtype:  #straphanger.commuter  a commuter who uses public transportation
  subtype:  #fare.passenger  a paying (taxi) passenger
  subtype:  #hitchhiker  a person who travels by getting free rides from passing vehicles
  subtype:  #stowaway  a person who hides aboard a ship or plane in the hope of getting free passage
  subtype:  #straphanger  a standing subway or bus passenger who grips a hanging strap for support

2 statements are about direct instances of #passenger: pm#graph1_on_human_motion, pm#graph1_on_flight
No  statement uses a specialization of #passenger; click here to add a statement.