 What we can see from the data that we have is that this entrance has a length of about 30, 80 meters, and probably then there will be an extended cavity in the subsurface. However, we cannot look further with respect to the entrance. Leonardo, looking at your paper, I realize, I don't know this, that there's been quite a lot of talk about these very deep pits that have been seen on the surface of the Moon, and quite a lot of them.