This is a steep drop off along the edge of the grass area, likely for drainage. I believe there is also a drain at the corner but I could be misremembering that. Perhaps this could be tagged better as some kind of embankment? I didn't feel the "ditch" tag was appropriate as this is rarely, if ever, filled with water

I believe the overlapping part is a stairwell of the student accomodation, not connected to the tesco express underneath, though the building kind of wraps around it. I am unsure of how to my it so feel free to simplify it or make it more precise

@VictorIE How should this rule be applied to areas such as School Grounds? E.g. Coláiste Choilm in Ballincollig has buildings that are all part of the school grounds, but some have distinct uses and some are general school buildings.
Should other School Grounds (or areas like hospitals, colleges, and fire stations), have their buildings labeled as School Buildings or just "Buildings"?