Answer the following question: 100 Van Ness Avenue - 100 Van Ness Avenue is a skyscraper in San Francisco currently undergoing a conversion from office to residential use. It is located in the Civic Center neighborhood near the San Francisco City Hall on Van Ness Avenue. 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?
Answer:
Building