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:  Tosna River (Russian: То́сна) is a river in Luzhsky Tosnensky and Kirovsky Districts of Leningrad Oblast Russia as well as in the city of Saint Petersburg. It is a left tributary of Neva River. The towns of Tosno Nikolskoye and Otradnoye as well as the urban-type settlement of Ulyanovka are located along the Tosna. The length of the Tosna is 121 kilometres (75 mi) and the area of its drainage basin is 1640 square kilometres (630 sq mi).

8