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:  The Tupolev ANT-14 Pravda was a Soviet aircraft which served as the flagship of the Soviet propaganda squadron. It has been credited as Russia's first all-metal aircraft with a corrosion-resistant-steel structure.The ANT-14 was a larger version of the ANT-9 with a 40.40m wingspan compared to the 23.80m of the ANT-9.

6