Task: Text Categorization
Input (English): Context: The Italian Adua-class submarine was the fourth subclass of the 600 Series of coastal submarines of the Regia Marina that served during World War II.There were 17 submarines in this class almost all named after places in Ethiopia which had been an Italian colony since 1936 but only one Alagi survived through World War II.Three submarines of this class (Gondar Ascianghi and Neghelli) were sold to Brazil and replaced with submarines of the same names.
Question: The document can be classified to which topic? 
Options: 1)Animal, 2)Athlete, 3)WrittenWork, 4)MeanOfTransportation
Output (English): 4