Towards a probabilistic model for lexical entailment

  • Authors:
  • Eyal Shnarch;Jacob Goldberger;Ido Dagan

  • Affiliations:
  • Bar-Ilan University, Ramat-Gan, Israel;Bar-Ilan University, Ramat-Gan, Israel;Bar-Ilan University, Ramat-Gan, Israel

  • Venue:
  • TIWTE '11 Proceedings of the TextInfer 2011 Workshop on Textual Entailment
  • Year:
  • 2011
  • A probabilistic lexical model for ranking textual inferences

    SemEval '12 Proceedings of the First Joint Conference on Lexical and Computational Semantics - Volume 1: Proceedings of the main conference and the shared task, and Volume 2: Proceedings of the Sixth International Workshop on Semantic Evaluation

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Abstract

While modeling entailment at the lexical-level is a prominent task, addressed by most textual entailment systems, it has been approached mostly by heuristic methods, neglecting some of its important aspects. We present a probabilistic approach for this task which covers aspects such as differentiating various resources by their reliability levels, considering the length of the entailed sentence, the number of its covered terms and the existence of multiple evidence for the entailment of a term. The impact of our model components is validated by evaluations, which also show that its performance is in line with the best published entailment systems.