Task: Text Categorization
Input (English): Context: The Porter River is a river of the Canterbury Region of New Zealand's South Island. It rises close to the southern end of the Craigieburn Range east of Lake Coleridge flowing generally northeast to reach the Broken River close to Castle Hill. the Porter Heights Skifield is located above the river valley's western flank and State Highway 73 follows the river's course for some distance to the west of Porters Pass
Question: The document can be classified to which topic? 
Options: 1)WrittenWork, 2)MeanOfTransportation, 3)NaturalPlace, 4)OfficeHolder, 5)Building
Output (English): 3