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: Consider Input: Context: Nagmati River is a river in western India in Gujarat whose origin is Near Bharapar village. Its basin has a maximum length of 50 km. The total catchment area of the basin is 135 km2.
Question: The document can be classified to which topic? 
Options: 1)Artist, 2)NaturalPlace, 3)Album, 4)EducationalInstitution, 5)Athlete

Output: 2


Input: Consider Input: Context: The FS E.645 and E.646 are two classes of similar electric locomotives used on Italian railways. They were introduced during the 1950s and they have been retired in 2009.
Question: The document can be classified to which topic? 
Options: 1)WrittenWork, 2)Athlete, 3)Plant, 4)MeanOfTransportation

Output: 4


Input: Consider Input: Context: Underdog: Original Soundtrack is the licenced soundtrack from the 2007 film adaption of Underdog. It is currently only available as a download on various online music stores.
Question: The document can be classified to which topic? 
Options: 1)Building, 2)EducationalInstitution, 3)Album, 4)Company, 5)Athlete


Output: 3