That’s what I thought too… but I couldn’t find it.
So thanks for linking it here!
So the question boils down to: can we add unique text IDs?
Just out of curiosity: why are the Enter and Exit verbs split for every object/door then? Did you started doing that, saw it was going to create too much hassle for writers and abandoned it?
(Not complaining though… as it allowed us to at least go through doors in a grammatically responsible way 
)