Please answer the following question: Dragon City Mall - Dragon City Mall is a shopping mall located in the Chinatown district Downtown Calgary.The mall was originally an office building but was converted into a mall in the early 1990s.It contains Asian themed venues varying from China Japan and Korea.The mall consists of three levels and has an up-only escalator leading to the second floor. Two elevators are available in addition to a flight of stairs. There are restaurants located on both the top and the bottom floors. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Building