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 River East Stour is one of the tributaries of the Great Stour in Kent. The East Stour 10.3 miles (16.5 km) long ) rises on the Greensand ridge at Postling north of Hythe as a number of small streams. It then flows under the M20 motorway to continue in a westward direction: the river meanders across the Low Weald plain passing Mersham on the way.

8