#paddle_steamer__paddle-wheeler  a steam vessel propelled by paddle wheels
  supertype:  steamship__steamer  a ship powered by one or more steam engines
  subtype:  side-wheeler  a paddle steamer having a paddle wheel on each side
  subtype:  sternwheeler  a paddle steamer having the paddle wheel in the stern

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