Definition: 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.
Input: Context: Žemoji Gervė is a river of Biržai district municipality Panevėžys County northern Lithuania.
Question: The document can be classified to which topic? 
Options: 1)Company, 2)Plant, 3)NaturalPlace, 4)Athlete

3