Task: Text Categorization
Input (English): Context: Lake Lagunitas is a reservoir on Lagunitas Creek in Marin County California.It is one of seven reservoirs providing potable water to the Marin Municipal Water District. Built in 1873 it is the oldest and smallest lake in the Mount Tamalpais watershed.[citation needed]
Question: The document can be classified to which topic? 
Options: 1)WrittenWork, 2)Animal, 3)Company, 4)NaturalPlace
Output (English): 4