Task: Text Categorization
Input (English): Context: The Vaal River (pronounced /ˈfɑːl/ and alternatively /ˈvɑːl/ especially by English speakers) is the largest tributary of the Orange River in South Africa. The river has its source near Breyten in Mpumalanga province east of Johannesburg and about 30 km north of Ermelo and only about 240 km from the Indian Ocean. It then flows westwards to its conjunction with the Orange River southwest of Kimberley in the Northern Cape.
Question: The document can be classified to which topic? 
Options: 1)Film, 2)Artist, 3)NaturalPlace, 4)Building, 5)Athlete
Output (English): 3