1. A method comprising: storing metadata related to items displayed on a display; receiving, by a computing device, an utterance; in response to the received utterance, applying, by the computing device, a disambiguation model to the utterance, including: identifying whether the utterance is directed to at least one of the plurality of items on the display, extracting a plurality of referential features from the utterance, and identifying an item among the plurality of items on the display corresponding to the utterance by comparing at least some of the plurality of referential features extracted from the utterance to the metadata; and performing, by the computing device, an action associated with the utterance in response to identifying the item corresponding to the utterance.