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: The E.412 class (factory name 112E) is a batch of multi-role electric locomotives built for the mountain lines particularly for the northern Italian lines of the Brenner pass. They are known as Brenner or Brennerlok locomotives. 28 units from both the groups have been acquired by Trenitalia as part of a process of unifying the rail networks between Italy Switzerland Austria and Germany.
Question: The document can be classified to which topic?
Options: 1)EducationalInstitution, 2)Athlete, 3)MeanOfTransportation, 4)Village, 5)OfficeHolder
3