Teacher:In this task, you are given a text which is the body of a document. You are given a question and options. Pick the correct number. Don't generate anything else apart from the numbers provided in options.
Teacher: Now, understand the problem? Solve this instance: Context: The Pamplonita River is the main river of the Colombian city of Cúcuta and one of the most important of the Norte de Santander Department.The pamplonita river was used to transport cacao the main form of wealth in the region and a major axis of the economy during the 18th and 19th centuries.It begins at 3000 m in the hill of Altogrande the desert of Fontibón the neighborhoods of Pamplona.It descends by the valley of the Cariongo leaves by the big hole of Pamplona and follows towards the northwest until the height of Chinácota receives waters of the gorge Honda and continues lowering until the valley of Cúcuta through where it happens tired and when leaving it is joined with the Táchira until ending at the mighty Zulia river that throws them to the lake of Maracaibo. 
Question: The document can be classified to which topic? 
Options: 1)Building, 2)Athlete, 3)Artist, 4)Album, 5)NaturalPlace
Student:
5