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VIDEO DOI: https://doi.org/10.48448/sn45-8b27

poster

ACL 2024

August 12, 2024

Bangkok, Thailand

Character-Level Chinese Dependency Parsing via Modeling Latent Intra-Word Structure

keywords:

word-internal structure

word segmentation

dependency parsing

Revealing the syntactic structure of sentences in Chinese poses significant challenges for word-level parsers due to the absence of clear word boundaries. To facilitate a transition from word-level to character-level Chinese dependency parsing, this paper proposes modeling latent internal structures within words. In this way, each word-level dependency tree is interpreted as a forest of character-level trees. A constrained Eisner algorithm is implemented to ensure the compatibility of character-level trees, guaranteeing a single root for intra-word structures and establishing inter-word dependencies between these roots. Experiments on Chinese treebanks demonstrate the superiority of our method over both the pipeline framework and previous joint models. A detailed analysis reveals that a coarse-to-fine parsing strategy empowers the model to predict more linguistically plausible intra-word structures.

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