In a scenario where there more than one Building at a Location, that Location should still only be counted once.
Please, fill in the blank and explain your choice.
~Thadeus
PS: I know which to choose, but cannot argue my case. I haven't diagrammed a sentence in roughly 30 years.
PPS: I realize that this can be reworded 500 different ways... I'm not really looking to reword, just understand.