In Florence, Italy, in the historical city center, we have an unique numbering system; each street has two series of independent numbering of buildings, differentiated by colors: red numbers are for businesses, black numbers for houses. So for instance a restaurant could be located on the number "23r" (r=red), while the standard "23" (black) can be hundreds of meters away in the same street.

I think there is currently no mapping system that handles this madness. Google Maps still does a decent job if you're looking for a specific place, because people have reported the exact gps positions of most businesses through user-reporting, but if you enter an address with a red number, you're unlikely to be correctly directed.

I guess the neural network knows nothing of colors...