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Contribution Analysis of Large Language Models and Data Augmentations for Person Names in Solving Legal Bar Examination at COLIEE 2023

Author

Listed:
  • Takaaki Onaga

    (Shizuoka University)

  • Masaki Fujita

    (Shizuoka University)

  • Yoshinobu Kano

    (Shizuoka University)

Abstract

This paper describes our system for COLIEE 2023 Task 4, which automatically answers Japanese legal bar exam problems. We propose an extension to our previous system in COLIEE 2022, which achieved the highest accuracy among all submissions using data augmentation. We focus on problems that include mentions of person names. In this paper, we present two main contributions. First, we incorporate LUKE as our deep learning component, which is a named entity recognition model trained on RoBERTa. Second, we fine-tune the pretrained LUKE model in multiple ways, comparing fine-tuning on training datasets that include alphabetical person names and ensembling different fine-tuning models. We confirmed that LUKE and its fine-tuned model on person type problems improve their accuracies. Our formal run results show that LUKE and our fine-tuning approach using alphabetical person names were effective, achieving an accuracy of 0.69 in the COLIEE 2023 Task 4 formal run.

Suggested Citation

  • Takaaki Onaga & Masaki Fujita & Yoshinobu Kano, 2024. "Contribution Analysis of Large Language Models and Data Augmentations for Person Names in Solving Legal Bar Examination at COLIEE 2023," The Review of Socionetwork Strategies, Springer, vol. 18(1), pages 123-143, April.
    • Handle: RePEc:spr:trosos:v:18:y:2024:i:1:d:10.1007_s12626-024-00155-5
    DOI: 10.1007/s12626-024-00155-5
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    1. Benedict G. C. Dellaert & Suzanne B. Shu & Theo A. Arentze & Tom Baker & Kristin Diehl & Bas Donkers & Nathanael J. Fast & Gerald Häubl & Heidi Johnson & Uma R. Karmarkar & Harmen Oppewal & Bernd H. S, 2020. "Consumer decisions with artificially intelligent voice assistants," Marketing Letters, Springer, vol. 31(4), pages 335-347, December.
    2. Benjamin Haibe-Kains & George Alexandru Adam & Ahmed Hosny & Farnoosh Khodakarami & Levi Waldron & Bo Wang & Chris McIntosh & Anna Goldenberg & Anshul Kundaje & Casey S. Greene & Tamara Broderick & Mi, 2020. "Transparency and reproducibility in artificial intelligence," Nature, Nature, vol. 586(7829), pages 14-16, October.
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    5. Juliano Rabelo & Randy Goebel & Mi-Young Kim & Yoshinobu Kano & Masaharu Yoshioka & Ken Satoh, 2022. "Overview and Discussion of the Competition on Legal Information Extraction/Entailment (COLIEE) 2021," The Review of Socionetwork Strategies, Springer, vol. 16(1), pages 111-133, April.
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