Definition: In this task, you are given a text which is the body of a document. Your job is to classify the topic of the document into these categories: 1)Company, 2)Educational Institution, 3)Artist, 4)Athlete, 5)Office Holder, 6)Mean of transportation, 7)Building, 8)Natural place, 9)Village, 10)Animal, 11)Plant, 12)Album, 13)Film, 14)Written work. Your output should be the category number. Don't generate anything apart from numbers 1-14.
Input: Text:  German submarine U-168 was a Type IXC/40 U-boat of the German Navy (Kriegsmarine) built for service during World War II. Her keel was laid down on March 15 1941 by the Deutsche Schiff- und Maschinenbau AG in Bremen as 'werk' 707. She was launched on March 5 1942 and commissioned on September 10 with Kapitänleutnant Helmuth Pich in command.

6