CUNI-Malta system at CoNLL-SIGMORPHON 2019 Shared Task on Morphological Analysis and Lemmatization in context: Operation-based word formation

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F19%3A10405559" target="_blank" >RIV/00216208:11320/19:10405559 - isvavai.cz</a>

Result on the web

<a href="https://www.aclweb.org/anthology/W19-4213/" target="_blank" >https://www.aclweb.org/anthology/W19-4213/</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

CUNI-Malta system at CoNLL-SIGMORPHON 2019 Shared Task on Morphological Analysis and Lemmatization in context: Operation-based word formation

Original language description

This paper presents the submission by the Charles University-University of Malta team to the CoNLL--SIGMORPHON 2019 Shared Task on Morphological Analysis and Lemmatization in context. We present a lemmatization model based on previous work on neural transducers cite{makarov2018neural,aharoni-goldberg-2017-morphological}. The key difference is that our model transform the whole word form in every stem, instead of consuming it character by character. We propose a merging strategy inspired by Byte-Pair-Encoding that reduces the space of valid operations by merging frequent adjacent operations. The resulting operations not only encode the action/s to be performed but the relative position in the word token and how characters need to be transformed. Our morphological tagger is a vanilla biLSTM tagger that operates over operation representations, encoding operations and words in a hierarchical manner. Even though relative performance according to metrics is below the baseline, experiments show that our mod

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

10201 - Computer sciences, information science, bioinformathics (hardware development to be 2.2, social aspect to be 5.8)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of the 16th SIGMORPHON Workshop on Computational Research in Phonetics, Phonology, and Morphology

ISBN

978-1-950737-36-9

ISSN

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e-ISSN

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Number of pages

9

Pages from-to

104-112

Publisher name

Association for Computational Linguistics

Place of publication

Stroudsburg, PA, USA

Event location

Firenze, Italy

Event date

Aug 2, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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