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.
Input: Context: The Convair Model 118 ConvAirCar (also known as the Hall Flying Automobile) was a prototype flying car of which two were built. Intended for mainstream consumers two prototypes were built and flown. The first prototype was lost after a safe but damaging low fuel incident. Subsequently the second prototype was rebuilt from the damaged aircraft and flown. By that time little enthusiasm remained for the project and the program ended shortly thereafter.
Question: The document can be classified to which topic?
Options: 1)Building, 2)Plant, 3)MeanOfTransportation, 4)Film
Output:
3