Although broader studies focusing on the pragmatic function of cue phrases, discourse markers, linguistic feedback, and dialogue acts do shed light on the particular subset of utterances we are studying, and although there is some information on particular lexical items we include here in our study, the class of ACWs itself has received little attention.
given the frequency of ACWs in dialogue, it is important to identify reliable and automatically extractable cues to their disambiguation, so that spoken dialogue systems can recognize the pragmatic function of ACWs in user input and can produce ACWs that are less likely to be misinterpreted in system output.