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.

Q: Context: German submarine U-81 was a Type VIIC U-boat of the German Navy during World War II.
Question: The document can be classified to which topic? 
Options: 1)OfficeHolder, 2)Film, 3)Artist, 4)Athlete, 5)MeanOfTransportation

A: 5
****
Q: Context: Lake Lagunitas is a reservoir on Lagunitas Creek in Marin County California.It is one of seven reservoirs providing potable water to the Marin Municipal Water District. Built in 1873 it is the oldest and smallest lake in the Mount Tamalpais watershed.[citation needed]
Question: The document can be classified to which topic? 
Options: 1)WrittenWork, 2)Animal, 3)Company, 4)NaturalPlace

A: 4
****
Q: Context: Don Carlos a.k.a. Don McCarlos (born Ervin Spencer 29 June 1952) is a Jamaican reggae singer and composer.
Question: The document can be classified to which topic? 
Options: 1)OfficeHolder, 2)Plant, 3)Company, 4)Artist, 5)MeanOfTransportation

A:
4
****