Task: Question Answering
Input (English): Passage: List of tallest buildings and structures -- The world's tallest artificial structure is the 829.8-metre-tall (2,722 ft) Burj Khalifa in Dubai (of the United Arab Emirates). The building gained the official title of ``Tallest Building in the World'' and the tallest self-supported structure at its opening on January 9, 2010. The second-tallest self-supporting structure and the tallest tower is the Tokyo Skytree. The tallest guyed structure is the KVLY-TV mast. Breetsky was the third building, which was surpassed by Tokyo in 1987.
Question: is the eiffel tower the tallest building in the world
Output (English): 0