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: HMS Maidstone was a 28-gun Coventry-class sixth-rate frigate of the Royal Navy.
Question: The document can be classified to which topic? 
Options: 1)Plant, 2)WrittenWork, 3)Artist, 4)MeanOfTransportation

4