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.

Example input: Text: The Mansfield Building Society is a UK building society which has its headquarters in Mansfield Nottinghamshire. It is a member of the Building Societies Association. 
Question: The document can be classified to which topic? Options: 1)Animal, 2)Plant, 3)Building, 4)Company, 5)WrittenWork
Example output: 3
Example explanation: Mansfield Building Society is a UK building society. Hence, option 3 is the correct answer
Q: Context: Ivoprop Corporation founded in 1984 by Ivo Zdarsky is an American manufacturer of composite propellers for homebuilt and ultralight aircraft as well as airboats. The company headquarters is located in Bellflower California.Zdarsky started the company after carving his own propeller for a homebuilt ultralight trike that he flew from Cold War Czechoslovakia over the Iron Curtain to Vienna in 1984.
Question: The document can be classified to which topic? 
Options: 1)Animal, 2)NaturalPlace, 3)Company, 4)Artist, 5)Building
A:
3