Abstract
Dependency-based models for the named entity recognition (NER) task have shown promising results by capturing long-distance relationships between words in a sentence. However, while existing models focus on the syntactic dependency between entities, we are unaware of any work that considers semantic dependency. In this work, we study the usefulness of semantic dependency information for NER. We propose a NER model that is guided by semantic dependency graphs instead of syntactic dependency trees. The extensive experiments illustrate the effectiveness of the proposed model and the advantages of semantic dependency over syntactic dependency for NER. Also, it shows correlations between the NER performance and the semantic dependency annotations qualities.
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Notes
- 1.
HanLP: https://github.com/hankcs/HanLP.
- 2.
- 3.
The named entity tags use the BIO labeling scheme: B-LOC labels the beginning of a location entity, I-LOC represents the inside word of the named entity, and O-LOC means outside a named entity.
- 4.
TEXT is the textbook corpus from SemEval-2016 Task 9, DM is the DELPH-IN corpus from SemEval-2015 Task 18, PAS is the Enju corpus from SemEval-2015 Task 18, PSD is the Prague corpus from SemEval-2015 Task 18, and LAS is the English Penn Treebank (PTB) corpus [15].
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Acknowledgements
This work is supported by the funding of State Key Laboratory of Communication Content Cognition (A32002) and Key Research and Development Program of Hubei Province (No. 2020BAB026).
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Wang, P., Wang, Z., Zhang, X., Wang, K., Feng, Z. (2021). Enhanced Named Entity Recognition with Semantic Dependency. In: Pham, D.N., Theeramunkong, T., Governatori, G., Liu, F. (eds) PRICAI 2021: Trends in Artificial Intelligence. PRICAI 2021. Lecture Notes in Computer Science(), vol 13032. Springer, Cham. https://doi.org/10.1007/978-3-030-89363-7_22
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