An Effective Transition-based Model for Discontinuous NER

• URL: http://arxiv.org/abs/2004.13454v1
• Date: Tue, 28 Apr 2020 12:19:12 GMT
• Title: An Effective Transition-based Model for Discontinuous NER
• Abstract summary: We propose a simple, effective transition-based model with generic neural encoding for discontinuous NER. We show that our model can effectively recognize discontinuous mentions without sacrificing the accuracy on continuous mentions.
• Score: 18.21146856681127
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Unlike widely used Named Entity Recognition (NER) data sets in generic domains, biomedical NER data sets often contain mentions consisting of discontinuous spans. Conventional sequence tagging techniques encode Markov assumptions that are efficient but preclude recovery of these mentions. We propose a simple, effective transition-based model with generic neural encoding for discontinuous NER. Through extensive experiments on three biomedical data sets, we show that our model can effectively recognize discontinuous mentions without sacrificing the accuracy on continuous mentions.

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