Task: Text Categorization
Input (English): Context: German submarine U-537 was a Type IXC/40 U-boat of Nazi Germany's Kriegsmarine built for service during World War II. Her keel was laid down on 10 April 1942 by Deutsche Werft in Hamburg. She was commissioned on 27 January 1943 with Kapitänleutnant Peter Schrewe in command.
Question: The document can be classified to which topic? 
Options: 1)EducationalInstitution, 2)Film, 3)Building, 4)Animal, 5)MeanOfTransportation
Output (English): 5