Learning with structured representations for negation scope extraction

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Abstract

We report an empirical study on the task of negation scope extraction given the negation cue. Our key observation is that certain useful information such as features related to negation cue, long distance dependencies as well as some latent structural information can be exploited for such a task. We design approaches based on conditional random fields (CRF), semi-Markov CRF, as well as latent-variable CRF models to capture such information. Extensive experiments on several standard datasets demonstrate that our approaches are able to achieve better results than existing approaches reported in the literature.

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APA

Li, H., & Lu, W. (2018). Learning with structured representations for negation scope extraction. In ACL 2018 - 56th Annual Meeting of the Association for Computational Linguistics, Proceedings of the Conference (Long Papers) (Vol. 2, pp. 533–539). Association for Computational Linguistics (ACL). https://doi.org/10.18653/v1/p18-2085

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