Situation: You were talking about Maria with someone and you hear somebody approaching. Ask your interlocutor if the person who is coming is Maria.
Interpretation of the utterance: Yes-no question with narrow focus and emphasis
Informator: F. B.
Utterance: Es pas la Magdalena, aquela qu'arriba?
Translation: Isn't it Magdalena, who is coming?
[Be(present, 3rd sing.) not the Magdalena, that that arrives?]