Pairwise embedding for event coreference resolution
Hu, Yanda
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https://hdl.handle.net/2142/108341
Description
Title
Pairwise embedding for event coreference resolution
Author(s)
Hu, Yanda
Issue Date
2020-05-12
Director of Research (if dissertation) or Advisor (if thesis)
Ji, Heng
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
event coreference
embedding
Abstract
Event coreference resolution is an important part in information extraction research and natural language understanding areas. Recently, the pre-trained language models emerging in modern Natural Language Processing (NLP) community provide a new perspective of solving classical NLP tasks. This thesis presents a novel, extensible, and error-tolerant model for within-document event coreference resolution. The model takes events from the same document pair wisely and extracts the features from both events. These features include but are not limited to sentence embeddings, trigger embeddings, and argument type representations. The extracted features are then used to fine-tune a pre-trained language model, BERT (Bidirectional Encoder Representations from Transformers), to perform event coreference resolution. The coreference results are evaluated by different metrics including B^3, MUC, and CEAF. Experimental results show that our pro-posed model outperforms baseline models with improvements of 0.009 on B^3 and 0.035 on MUC over the state-of-the-art models.
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