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: The Itapirapuã River is a river on the boundary between the Paraná and São Paulo states in southeastern Brazil.
Question: The document can be classified to which topic? 
Options: 1)Animal, 2)MeanOfTransportation, 3)OfficeHolder, 4)Athlete, 5)NaturalPlace

5