 They have to have large hallways, they have to have elevators, they have to use a lot of steel and concrete to build them, and they have big lobbies, and all of these things increase the cost so that instead of building a 20,000 square foot building that's all livable, they build a 20,000 square foot building and about 40% of it is shared common areas, which means only 60% of it is livable.