You will be given a definition of a task first, then some input of the task.
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.

Context: Porth is a crater on the planet Mars. It is named after the town of Porth Rhondda Cynon Taff south Wales United Kingdom. It is located at 21.4N 255.9W and has a diameter of 9.3 km.
Question: The document can be classified to which topic?
Options: 1)Plant, 2)Building, 3)MeanOfTransportation, 4)NaturalPlace
Output:
4