Given the task definition and input, reply with output. 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: The Robot Building located in the Sathorn business district of Bangkok Thailand houses United Overseas Bank's Bangkok headquarters. It was designed for the Bank of Asia by Sumet Jumsai to reflect the computerization of banking; its architecture is a reaction against neoclassical and high-tech postmodern architecture. The building's features such as progressively receding walls antennas and eyes contribute to its robotic appearance and to its practical function.
Question: The document can be classified to which topic?
Options: 1)EducationalInstitution, 2)NaturalPlace, 3)Building, 4)Plant, 5)Album
3