Discontinuous Constituent Parsing as Sequence Labeling

David Vilares; Carlos Gómez-Rodríguez

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arXiv · 2010.00633

Discontinuous Constituent Parsing as Sequence Labeling

David Vilares·Carlos Gómez-Rodríguez

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Abstract

This paper reduces discontinuous parsing to sequence labeling. It first shows that existing reductions for constituent parsing as labeling do not support discontinuities. Second, it fills this gap and proposes to encode tree discontinuities as nearly ordered permutations of the input sequence. Third, it studies whether such discontinuous representations are learnable. The experiments show that despite the architectural simplicity, under the right representation, the models are fast and accurate.

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David Vilares, Carlos Gómez-Rodríguez. 2020-10-01. Discontinuous Constituent Parsing as Sequence Labeling. https://arxiv.org/abs/2010.00633

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