original question: How many functions does the [Empire State Building] serve?
answer: 2
answer type: Building function.
auxiliary information: The Empire State Building is a 102-story skyscraper located in Midtown Manhattan, New York City, on Fifth Avenue between West 33rd and 34th Streets. It has a roof height of 1,250 feet, and with its antenna spire included, it stands a total of 1,454 feet high. Its name is derived from the nickname for New York, the Empire State. It stood as the world's tallest building for nearly 40 years, from its completion in early 1931 until the topping out of the original World Trade Center's North Tower in late 1970. Following the September 11 attacks in 2001, the Empire State Building was again the tallest building in New York, until One World Trade Center reached a greater height in April 2012. The Empire State Building is currently the fifth-tallest completed skyscraper in the United States and the 25th-tallest in the world. It is also the fifth-tallest freestanding structure in the Americas. When measured by pinnacle height, it is the fourth-tallest building in the United States. The Empire State Building is generally thought of as an American cultural icon.
The [Empire State Building] serves multiple purposes, how many functions does it exactly serve?