Instructions: 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: Taku Glacier is a tidewater glacier located in Taku Inlet in the U.S. state of Alaska just southeast of the city of Juneau. Recognized as the deepest and thickest glacier known in the world the Taku Glacier is measured at 4845 feet (1477 m) thick.
Question: The document can be classified to which topic?
Options: 1)MeanOfTransportation, 2)Building, 3)NaturalPlace, 4)Athlete, 5)EducationalInstitution
Output:
3