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 Oker is a river in Lower Saxony Germany that has historically formed an important political boundary. It is a left tributary of the River Aller 105 kilometres (65 mi) in length and runs in a generally northerly direction.
Question: The document can be classified to which topic?
Options: 1)Film, 2)NaturalPlace, 3)OfficeHolder, 4)Company
Output:
2