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 Mooi River (Afrikaans: Mooirivier) is a river in North West Province South Africa. It is a tributary of the Vaal River and belongs to the Upper Vaal Water Management Area.
Question: The document can be classified to which topic? 
Options: 1)Athlete, 2)Artist, 3)OfficeHolder, 4)MeanOfTransportation, 5)NaturalPlace

Ex Output:
5


Ex Input:
Context: W.B. Mason based in Brockton Ma. is the largest privately held office products dealer in the U.S. that competes with Staples OfficeMax Office Depot and New England Office Supply. W.B. Mason primarily serves the New England and Mid-Atlantic areas of the United States. They have 42 distribution centers as well as sales offices in New York City and Philadelphia. The company has 2271 employees 900 sales representatives 450 delivery trucks (leased from Ryder) and over 180000 customers.
Question: The document can be classified to which topic? 
Options: 1)Building, 2)Film, 3)WrittenWork, 4)Company, 5)MeanOfTransportation

Ex Output:
4


Ex Input:
Context: The Wedell-Williams Model 44 is a racing aircraft four examples of which were built in the United States in the early 1930s by the Wedell-Williams Air Service Corporation. It began as a rebuilding of the partnership's successful We-Will 1929 racer but soon turned into a completely new racing monoplane aircraft powered by a large radial engine.
Question: The document can be classified to which topic? 
Options: 1)OfficeHolder, 2)Athlete, 3)Company, 4)MeanOfTransportation

Ex Output:

4