Detailed Instructions: 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.
Q: Context: The Rhaetian Railway Ge 6/6 II is a class of heavy metre gauge electric locomotives operated by the Rhaetian Railway (RhB) which is the main railway network in the Canton of Graubunden Switzerland.The class is so named because it was the second class of locomotives of the Swiss locomotive and railcar classification type Ge 6/6 to be acquired by the Rhaetian Railway.
Question: The document can be classified to which topic?
Options: 1)Village, 2)NaturalPlace, 3)MeanOfTransportation, 4)WrittenWork, 5)Album
A:
3