In this task, you are given a text which is the body of a document. You are given a question and options. Pick the correct number. Don't generate anything else apart from the numbers provided in options.

Context: USS Shawnee was a single-turreted twin-screw monitor built by Curtis & Tilden Boston MA. It was delivered 22 July 1865 and commissioned 18 August 1865. Shawnee was a Casco-class light-draft monitor intended for service in the shallow bays rivers and inlets of the Confederacy. These warships sacrificed armor plate for a shallow draft and were fitted with a ballast compartment designed to lower them in the water during battle.
Question: The document can be classified to which topic?
Options: 1)Athlete, 2)NaturalPlace, 3)MeanOfTransportation, 4)WrittenWork, 5)Film
3