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: Come Swing with Me! is an album by American singer Frank Sinatra released in 1961.The album is Sinatra's final swing session with Capitol Records as his next album Point of No Return would be composed mainly of torch songs. This album is possibly unique for the orchestral arrangement and stereophonic set-up by Billy May.
Question: The document can be classified to which topic? 
Options: 1)WrittenWork, 2)Plant, 3)MeanOfTransportation, 4)Album
[A]: 4


[Q]: 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
[A]: 4


[Q]: Context: The Elvo (Piedmontese: Elv) is a 53 km torrent (an intermittent stream) in the Piedmont region of north-west Italy and is the principal tributary of the Cervo. It runs through the communes of Sordevolo Occhieppo Superiore Occhieppo Inferiore Cerrione and Salussola in the Province of Biella and of Carisio and Casanova Elvo in the Province of Vercelli. The river’s valley is named after it as the Valle dell'Elvo.
Question: The document can be classified to which topic? 
Options: 1)Athlete, 2)Animal, 3)MeanOfTransportation, 4)Album, 5)NaturalPlace
[A]:
5