EUSKOR: End-to-end coreference resolution system for Basque
Autoři:
Ander Soraluze aff001; Olatz Arregi aff002; Xabier Arregi aff001; Arantza Díaz de Ilarraza aff001
Působiště autorů:
Computer Languages and Systems Department, University of the Basque Country, Donostia-San Sebastian, Spain
aff001; Computer Architecture and Technology Department, University of the Basque Country, Donostia-San Sebastian, Spain
aff002
Vyšlo v časopise:
PLoS ONE 14(9)
Kategorie:
Research Article
doi:
https://doi.org/10.1371/journal.pone.0221801
Souhrn
This paper describes the process of adapting the Stanford Coreference resolution module to the Basque language, taking into account the characteristics of the language. The module has been integrated in a linguistic analysis pipeline obtaining an end-to-end coreference resolution system for the Basque language. The adaptation process explained can benefit and facilitate other languages with similar characteristics in the implementation of their coreference resolution systems. During the experimentation phase, we have demonstrated that language-specific features have a noteworthy effect on coreference resolution, obtaining a gain in CoNLL score of 7.07 with respect to the baseline system. We have also analysed the effect that preprocessing has in coreference resolution, comparing the results obtained with automatic mentions versus gold mentions. When gold mentions are provided, the results increase 11.5 points in CoNLL score in comparison with results obtained when automatic mentions are used. The contribution of each sieve is analysed concluding that morphology is essential for agglutinative languages to obtain good performance in coreference resolution. Finally, an error analysis of the coreference resolution system is presented which have revealed our system’s weak points and help to determine the improvements of the system. As a result of the error analysis, we have enriched the Basque coreference resolution adding new two sieves, obtaining an improvement of 0.24 points in CoNLL F1 when automatic mentions are used and of 0.39 points when the gold mentions are provided.
Klíčová slova:
Biology and life sciences – Neuroscience – Cognitive science – Cognitive psychology – Language – Psychology – Social sciences – Linguistics – Linguistic morphology – Grammar – Syntax – Semantics – Sociology – Communications – Mass media – Encyclopedias – Online encyclopedias – Computer and information sciences – Software engineering – Preprocessing – Engineering and technology – People and places – Geographical locations – Europe
Zdroje
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PLOS One
2019 Číslo 9
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