Northwestern 12 at Daleel 2026: CAMeLBERT-Mix for Multi-Label Arabic Argumentative Discourse Unit Classification

Eman Sedqy Shlkamy, Wajdi Zaghouani


Abstract
This paper presents our submission to Task 1 (Argumentative Discourse Unit Classification, Closed Track) of the Daleel 2026 Shared Task. The task addresses Arabic multi-label argumentative discourse unit classification at the paragraph level. Our system fine-tunes CAMeLBERT-Mix using a class-weighted Binary Cross-Entropy loss, paragraph-type-aware input representation, head-tail tokenization for long paragraphs, and label-specific threshold optimization. On the official development set, the proposed system achieves a Macro F1-score of 0.6121, a Micro F1-score of 0.7509, and a Samples F1-score of 0.6387. These results suggest that a carefully optimized CAMeLBERT-Mix framework provides a competitive and reproducible approach for Arabic argumentative discourse unit classification under the Closed Track setting.
Anthology ID:
2026.arabicnlp-sharedtasks.167
Volume:
Proceedings of The Fourth Arabic Natural Language Processing Conference: Shared Tasks
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Muhammad Abdul-Mageed, Tamer Elsayed, Houda Bouamor, Samhaa El-Beltagy, Hend Al-Khalifa, Ahmed Abdelali, AbdelRahim Elmadany, Abdellah El Mekki, Kareem Darwish, Sakhar Alkhereyf, Hamzah Luqman, Salam Khalifa, Samar Magdy, Zaid Alyafeai, Injy Hamed, Wajdi Zaghouani, Imed Zitouni
Venue:
ArabicNLP
SIG:
SIGARAB
Publisher:
Association for Computational Linguistics
Note:
Pages:
1344–1348
Language:
URL:
https://aclanthology.org/2026.arabicnlp-sharedtasks.167/
DOI:
Bibkey:
Cite (ACL):
Eman Sedqy Shlkamy and Wajdi Zaghouani. 2026. Northwestern 12 at Daleel 2026: CAMeLBERT-Mix for Multi-Label Arabic Argumentative Discourse Unit Classification. In Proceedings of The Fourth Arabic Natural Language Processing Conference: Shared Tasks, pages 1344–1348, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
Northwestern 12 at Daleel 2026: CAMeLBERT-Mix for Multi-Label Arabic Argumentative Discourse Unit Classification (Shlkamy & Zaghouani, ArabicNLP 2026)
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PDF:
https://aclanthology.org/2026.arabicnlp-sharedtasks.167.pdf