Unsupervised Labeled Parsing with Deep Inside-Outside Recursive Autoencoders

Andrew Drozdov,Pat Verga,Yi-Pei Chen,Mohit Iyyer,A. McCallum

Published 2019 in Conference on Empirical Methods in Natural Language Processing

ABSTRACT

Understanding text often requires identifying meaningful constituent spans such as noun phrases and verb phrases. In this work, we show that we can effectively recover these types of labels using the learned phrase vectors from deep inside-outside recursive autoencoders (DIORA). Specifically, we cluster span representations to induce span labels. Additionally, we improve the model’s labeling accuracy by integrating latent code learning into the training procedure. We evaluate this approach empirically through unsupervised labeled constituency parsing. Our method outperforms ELMo and BERT on two versions of the Wall Street Journal (WSJ) dataset and is competitive to prior work that requires additional human annotations, improving over a previous state-of-the-art system that depends on ground-truth part-of-speech tags by 5 absolute F1 points (19% relative error reduction).

PUBLICATION RECORD

  • Publication year

    2019

  • Venue

    Conference on Empirical Methods in Natural Language Processing

  • Publication date

    2019-11-01

  • Fields of study

    Computer Science

  • Identifiers
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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REFERENCES

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