pm#gas_powered_car__gaspoweredcar
  exclusion:  electric_car  car_with_diesel  car_with_super_petrol  car_with_unleaded_petrol  car_with_leaded_petrol
  supertype:  car_with_a_certain_energy_source
  subtype:  Stanley_Steamer  (trademark) a steam-powered automobile

No statement uses or specializes gas_powered_car; click here to add one.