BME-UW at SRST-2019: Surface realization with Interpreted Regular Tree Grammars

Ádám Kovács, Evelin Ács, Judit Ács, Andras Kornai, Gábor Recski

Abstract
The Surface Realization Shared Task involves mapping Universal Dependency graphs to raw text, i.e. restoring word order and inflection from a graph of typed, directed dependencies between lemmas. Interpreted Regular Tree Grammars (IRTGs) encode the correspondence between generations in multiple algebras, and have previously been used for semantic parsing from raw text. Our system induces an IRTG for simultaneously building pairs of surface forms and UD graphs in the SRST training data, then prunes this grammar for each UD graph in the test data for efficient parsing and generation of the surface ordering of lemmas. For the inflection step we use a standard sequence-to-sequence model with a biLSTM encoder and an LSTM decoder with attention. Both components of our system are available on GitHub under an MIT license.
Anthology ID:
D19-6304
Volume:
Proceedings of the 2nd Workshop on Multilingual Surface Realisation (MSR 2019)
Month:
November
Year:
2019
Address:
Hong Kong, China
Editors:
Simon Mille, Anja Belz, Bernd Bohnet, Yvette Graham, Leo Wanner
Venue:
WS
SIG:
SIGGEN
Publisher:
Association for Computational Linguistics
Note:
Pages:
35–40
Language:
URL:
https://aclanthology.org/D19-6304
DOI:
10.18653/v1/D19-6304
Bibkey:
Cite (ACL):
Ádám Kovács, Evelin Ács, Judit Ács, Andras Kornai, and Gábor Recski. 2019. BME-UW at SRST-2019: Surface realization with Interpreted Regular Tree Grammars. In Proceedings of the 2nd Workshop on Multilingual Surface Realisation (MSR 2019), pages 35–40, Hong Kong, China. Association for Computational Linguistics.
Cite (Informal):
BME-UW at SRST-2019: Surface realization with Interpreted Regular Tree Grammars (Kovács et al., 2019)
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