JCT at SemEval-2020 Task 12: Offensive Language Detection in Tweets Using Preprocessing Methods, Character and Word N-grams

Moshe Uzan, Yaakov HaCohen-Kerner

Abstract
In this paper, we describe our submissions to SemEval-2020 contest. We tackled subtask 12 - “Multilingual Offensive Language Identification in Social Media”. We developed different models for four languages: Arabic, Danish, Greek, and Turkish. We applied three supervised machine learning methods using various combinations of character and word n-gram features. In addition, we applied various combinations of basic preprocessing methods. Our best submission was a model we built for offensive language identification in Danish using Random Forest. This model was ranked at the 6 position out of 39 submissions. Our result is lower by only 0.0025 than the result of the team that won the 4 place using entirely non-neural methods. Our experiments indicate that char ngram features are more helpful than word ngram features. This phenomenon probably occurs because tweets are more characterized by characters than by words, tweets are short, and contain various special sequences of characters, e.g., hashtags, shortcuts, slang words, and typos.
Anthology ID:
2020.semeval-1.266
Volume:
Proceedings of the Fourteenth Workshop on Semantic Evaluation
Month:
December
Year:
2020
Address:
Barcelona (online)
Editors:
Aurelie Herbelot, Xiaodan Zhu, Alexis Palmer, Nathan Schneider, Jonathan May, Ekaterina Shutova
Venue:
SemEval
SIG:
SIGLEX
Publisher:
International Committee for Computational Linguistics
Note:
Pages:
2017–2022
Language:
URL:
https://aclanthology.org/2020.semeval-1.266
DOI:
10.18653/v1/2020.semeval-1.266
Bibkey:
Cite (ACL):
Moshe Uzan and Yaakov HaCohen-Kerner. 2020. JCT at SemEval-2020 Task 12: Offensive Language Detection in Tweets Using Preprocessing Methods, Character and Word N-grams. In Proceedings of the Fourteenth Workshop on Semantic Evaluation, pages 2017–2022, Barcelona (online). International Committee for Computational Linguistics.
Cite (Informal):
JCT at SemEval-2020 Task 12: Offensive Language Detection in Tweets Using Preprocessing Methods, Character and Word N-grams (Uzan & HaCohen-Kerner, SemEval 2020)
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PDF:
https://preview.aclanthology.org/proper-vol2-ingestion/2020.semeval-1.266.pdf
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