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.

Text: The Aisne is a river in northeastern France left tributary of the river Oise. It gave its name to the French departement Aisne. It was known in the Roman period as Axona.It rises in the forest of Argonne at Rembercourt-Sommaisne near Sainte-Menehould. It flows north and then west before joining the Oise River near Compiegne. The Aisne is about 290 kilometres (180 mi) long. Three bitter battles of World War I were fought into the valleys of the Aisne.
8