Discourse relations: a structural and presuppositional account using lexicalised TAG

  • Authors:
  • Bonnie Webber;Alistair Knott;Matthew Stone;Aravind Joshi

  • Affiliations:
  • Univ of Edinburgh;Univ of Otago;Rutgers Univ;Univ of Pennsylvania

  • Venue:
  • ACL '99 Proceedings of the 37th annual meeting of the Association for Computational Linguistics on Computational Linguistics
  • Year:
  • 1999

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Abstract

We show that discourse structure need not bear the full burden of conveying discourse relations by showing that many of them can be explained nonstructurally in terms of the grounding of anaphoric presuppositions (Van der Sandt, 1992). This simplifies discourse structure, while still allowing the realisation of a full range of discourse relations. This is achieved using the same semantic machinery used in deriving clause-level semantics.