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.
--------
Question: 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

Answer: 4


Question: Context: Petr Vasiliev (also Pyotr Vasiliev Uzbek: Пётр Васильев; born April 21 1981) is a retired Uzbekistani swimmer who specialized in freestyle events.
Question: The document can be classified to which topic? 
Options: 1)EducationalInstitution, 2)Plant, 3)Building, 4)Athlete

Answer: 4


Question: Context: The Mirror of Love is an epic poem by Alan Moore written in the form of a romantic letter. Sappho Michelangelo Shakespeare Emily Dickinson Oscar Wilde and many others are woven into this rich visceral piece which documents the history of same-sex love throughout mankind's history and comments on its modern day state.
Question: The document can be classified to which topic? 
Options: 1)Building, 2)MeanOfTransportation, 3)Athlete, 4)WrittenWork

Answer:
4