Morphological disambiguation from stemming data

Antoine Nzeyimana


Abstract
Morphological analysis and disambiguation is an important task and a crucial preprocessing step in natural language processing of morphologically rich languages. Kinyarwanda, a morphologically rich language, currently lacks tools for automated morphological analysis. While linguistically curated finite state tools can be easily developed for morphological analysis, the morphological richness of the language allows many ambiguous analyses to be produced, requiring effective disambiguation. In this paper, we propose learning to morphologically disambiguate Kinyarwanda verbal forms from a new stemming dataset collected through crowd-sourcing. Using feature engineering and a feed-forward neural network based classifier, we achieve about 89% non-contextualized disambiguation accuracy. Our experiments reveal that inflectional properties of stems and morpheme association rules are the most discriminative features for disambiguation.
Anthology ID:
2020.coling-main.409
Volume:
Proceedings of the 28th International Conference on Computational Linguistics
Month:
December
Year:
2020
Address:
Barcelona, Spain (Online)
Editors:
Donia Scott, Nuria Bel, Chengqing Zong
Venue:
COLING
SIG:
Publisher:
International Committee on Computational Linguistics
Note:
Pages:
4649–4660
Language:
URL:
https://aclanthology.org/2020.coling-main.409
DOI:
10.18653/v1/2020.coling-main.409
Bibkey:
Cite (ACL):
Antoine Nzeyimana. 2020. Morphological disambiguation from stemming data. In Proceedings of the 28th International Conference on Computational Linguistics, pages 4649–4660, Barcelona, Spain (Online). International Committee on Computational Linguistics.
Cite (Informal):
Morphological disambiguation from stemming data (Nzeyimana, COLING 2020)
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PDF:
https://aclanthology.org/2020.coling-main.409.pdf