You will be given a definition of a task first, then some input of the task.
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: This article is about an aircraft of World War I. For the pre-war design of the same designation see Breguet Type IV.The Breguet Bre.4 also known variously as the Type IV and BUM was a French biplane bomber of World War I. A fighter version of it also was produced as the BUC and BLC; some of these saw service with the British Royal Navy which called them 'the Breguet 'de Chasse.
Question: The document can be classified to which topic?
Options: 1)NaturalPlace, 2)MeanOfTransportation, 3)OfficeHolder, 4)Animal, 5)EducationalInstitution
Output:
2