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 Lokoro River is a river in the Democratic Republic of the Congo one of the largest affluents of Lake Mai-Ndombe.The river originates in the Dekese Territory then flows west through the Lokolama sector of Oshwe Territory in Mai-Ndombe District then northwestward along the boundary between Kiri Territory and Inongo Territory to enter the northern part of Lake Mai-Ndombe.The river runs through extensive areas of permanent swamp forest.When the heavy rains begin in October the river floods and brings oxygenated water and nutrients into the swamp forests.Near the upper Lokolo there is a great intercalary savanna named Ita.This seems to have been the location of a Bolia chiefdom at the end of the fourteenth century.The headwaters of the river are in the southern part of the Salonga National ParkMost of the park is accessible only via river. 

8