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.

Context: Airship Ventures Inc. was a private company that offered sight-seeing rides (which the company called flightseeing) in a 12-passenger Zeppelin NT out of a World War II United States Navy hangar at Moffett Federal Airfield near Mountain View California.As of December 2012 their airship built by Zeppelin Luftschifftechnik GmbH is in a state of disassembly but is still one of three zeppelins in the world.
Question: The document can be classified to which topic?
Options: 1)Plant, 2)Album, 3)Film, 4)Company, 5)Animal
4