JustifIT-QA: Evidence-Grounded Legal Question Answering in Italian

Niko Dalla Noce, Davide Bacciu, Sina Farhang Doust, Lorenzo De Mattei


Abstract
Grounded legal question answering requires retrieving the relevant statutory provisions, generating legally sound answers, and supporting them with explicit evidence. We introduce JustifIT-QA, the first Italian statutory QA dataset with expert-written answers and fine-grained evidence spans, and present DARv2, a dense retriever that improves coverage of relevant legal texts. Building on this retrieval layer, we study a judge-based feedback loop in which an LLM critiques and refines generated answers, and we evaluate LLMs as judges for legal answer correctness. Results show that feedback improves expert-rated answer quality when relevant context is retrieved, while evidence extraction benefits from stronger models but remains challenging. We release the dataset, code, and retriever to support future research on grounded and explainable legal QA in Italian.
Anthology ID:
2026.emnlp-main.593
Volume:
Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing
Month:
October
Year:
2026
Address:
Budapest, Hungary
Editors:
Hung-Yi Lee, Sunipa Dev, Jessy Li, Desmond Elliott
Venue:
EMNLP
SIG:
SIGDAT
Publisher:
Association for Computational Linguistics
Note:
Pages:
13661–13685
Language:
URL:
https://aclanthology.org/2026.emnlp-main.593/
DOI:
Bibkey:
Cite (ACL):
Niko Dalla Noce, Davide Bacciu, Sina Farhang Doust, and Lorenzo De Mattei. 2026. JustifIT-QA: Evidence-Grounded Legal Question Answering in Italian. In Proceedings of the 2026 Conference on Empirical Methods in Natural Language Processing, pages 13661–13685, Budapest, Hungary. Association for Computational Linguistics.
Cite (Informal):
JustifIT-QA: Evidence-Grounded Legal Question Answering in Italian (Noce et al., EMNLP 2026)
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PDF:
https://aclanthology.org/2026.emnlp-main.593.pdf