What is the oldest steamboat still operating on the Mississippi?
Steamboat
{'answer_start': array([4]), 'answer_text': array(['Belle of Louisville'], dtype=object)}
The Belle of Louisville is the oldest operating steamboat in the United States, and the oldest operating Mississippi River-style steamboat in the world. She was laid down as Idlewild in 1914, and is currently located in Louisville, Ky.[48]