good but how do you teach a model EBN a transport network and this is again where it comes to self supervision where it comes to creativity how can you frame a problem from the data you have to make this happen one way is to for example randomly sample 32 by 32 pixels again these small image tiles from a map of Vienna which is publicly available of course and then you just automatically check which line of transport is running on that tile it's all information is publicly available again you take that as labels