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.

Ex 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

Ex Output:
4

Ex Input:
Context: Knema communis is a species of plant in the Myristicaceae family. It is found in Malaysia and Singapore. It is threatened by habitat loss.
Question: The document can be classified to which topic?
Options: 1)Athlete, 2)EducationalInstitution, 3)Village, 4)Plant, 5)Company

Ex Output:
4

Ex Input:
Context: Renown was a German barque used as a sailing cargo ship built prior to 1873 when she made her first voyage.
Question: The document can be classified to which topic?
Options: 1)OfficeHolder, 2)MeanOfTransportation, 3)WrittenWork, 4)Artist, 5)Plant

Ex Output:
2