Discourse parsing for multi-party chat dialogues

Stergos Afantenos (1, 2) , Eric Kow (1) , Nicholas Asher (1, 3) , Jérémy Perret (1)

1 IRIT-MELODI - MEthodes et ingénierie des Langues, des Ontologies et du DIscours
2 UT3 - Université Toulouse III - Paul Sabatier
3 CNRS - Centre National de la Recherche Scientifique

In this paper we present the first ever, to the best of our knowledge, discourse parser for multi-party chat dialogues. Discourse in multi-party dialogues dramatically differs from monologues since threaded conversations are commonplace rendering prediction of the discourse structure compelling. Moreover, the fact that our data come from chats renders the use of syntactic and lexical information useless since people take great liberties in expressing themselves lexically and syntactically. We use the dependency parsing paradigm as has been done in the past (Muller et al., 2012; Li et al., 2014). We learn local probability distributions and then use MST for decoding. We achieve 0.680 F 1 on unlabelled structures and 0.516 F 1 on fully labeled structures which is better than many state of the art systems for monologues, despite the inherent difficulties that multi-party chat dialogues have.

Mots clés: Sheep; Discourse; Dialogue; Parsing; CDU

Domaines: Intelligence artificielle [cs.AI]; Apprentissage [cs.LG]; Logique en informatique [cs.LO]; Informatique et langage [cs.CL]

Stergos Afantenos, Eric Kow, Nicholas Asher, Jérémy Perret. Discourse parsing for multi-party chat dialogues. Conference on Empirical Methods on Natural Language Processing (EMNLP 2015), Sep 2015, Lisbon, Portugal. pp. 928-937. ⟨hal-01535954⟩