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: The S class was an express passenger steam locomotive that ran on Victorian Railways Australia from 1928 to 1954. Built when the VR was at its zenith and assigned to haul the broad gauge-leg of its Melbourne to Sydney interstate express passenger services the S class remained the VR's most prestigious locomotive class until the advent of diesel electric locomotives in the early 1950s.They were the first Pacific-type locomotives on the VR as well as its first 3-cylinder locomotive type.
Question: The document can be classified to which topic? 
Options: 1)Film, 2)MeanOfTransportation, 3)Company, 4)Album, 5)Plant

A: 2
****
Q: Context: Huang Shao-ku (Chinese: 黃少谷; pinyin: Huáng Shǎogǔ) was a politician in the Republic of China. He was the Vice Premier in 1954–1958 and 1966–1969.
Question: The document can be classified to which topic? 
Options: 1)Artist, 2)NaturalPlace, 3)OfficeHolder, 4)WrittenWork

A: 3
****
Q: Context: The Ibicuí da Armada River is a river of Rio Grande do Sul state in southern Brazil.
Question: The document can be classified to which topic? 
Options: 1)Artist, 2)Building, 3)NaturalPlace, 4)OfficeHolder, 5)EducationalInstitution

A:
3
****