Definition: 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: MV Alexia was one of nine Royal Dutch/Shell oil tankers converted to become a Merchant Aircraft Carrier (MAC ship). The group is collectively known as the Rapana class.MV Alexia was built at Bremer Vulkan and completed in April 1935 as an oil tanker for the Anglo Saxon Royal Dutch/Shell line. She was converted to a MAC ship entering service in December 1943.As a MAC ship she had no aircraft hangar and continued to carry normal cargoes although operating under Royal Navy control.
Question: The document can be classified to which topic?
Options: 1)Athlete, 2)Animal, 3)Village, 4)MeanOfTransportation, 5)Building
Output:
4