As a matter of fact, the semantics of question (13) is: {x/se trouve(mon portable, x)} 2 and one element of this set is therefore an object that can be designated by the LPP "à côté de la tasse"/"next to the cup" (which is clearly a different object from the one designated by the NP "la tasse"/"the cup").
we conclude that LPPs introduce individuals that can be viewed as answers to locative questions.