Are you asking why there is no liaison between "d'après" and "elle"? If so, it's because that's an optional liaison. http://french.about.com/library/pronunciation/bl-liaisons-o.htm
oktor. après is not d'après. D'APRÈS: generally is a preposition, meaning "selon, conformément à, selon le modèle de (according to, following, depending on,in someone's opinion). However, it can take the function of an adjective too (standing always next to a noun), thus having the same meaning as the preposition après, i.e. suivant (after, next). Ex. La minute d'après , il sortit (The next minute, he went out. Obviously our sentence uses d'après as preposition. Happy Duolingoing!