DataHacks at PerAnsSumm 2025: LoRA-Driven Prompt Engineering for Perspective Aware Span Identification and Summarization

Vansh Nawander, Chaithra Reddy Nerella


Abstract
This paper presents the approach of the DataHacks team in the PerAnsSumm Shared Task at CL4Health 2025, which focuses on perspective-aware summarization of healthcare community question-answering (CQA) forums. Unlike traditional CQA summarization, which relies on the best-voted answer, this task captures diverse perspectives, including ‘cause,’ ‘suggestion,’ ‘experience,’ ‘question,’ and ‘information.’ The task is divided into two subtasks: (1) identifying and classifying perspective-specific spans, and (2) generating perspective-specific summaries. We addressed these tasks using Large Language Models (LLM), fine-tuning it with different low-rank adaptation (LoRA) configurations to balance performance and computational efficiency under resource constraints. In addition, we experimented with various prompt strategies and analyzed their impact on performance. Our approach achieved a combined average score of 0.42, demonstrating the effectiveness of fine-tuned LLMs with adaptive LoRA configurations for perspective-aware summarization.
Anthology ID:
2025.cl4health-1.33
Volume:
Proceedings of the Second Workshop on Patient-Oriented Language Processing (CL4Health)
Month:
May
Year:
2025
Address:
Albuquerque, New Mexico
Editors:
Sophia Ananiadou, Dina Demner-Fushman, Deepak Gupta, Paul Thompson
Venues:
CL4Health | WS
SIG:
Publisher:
Association for Computational Linguistics
Note:
Pages:
374–379
Language:
URL:
https://preview.aclanthology.org/fix-sig-urls/2025.cl4health-1.33/
DOI:
Bibkey:
Cite (ACL):
Vansh Nawander and Chaithra Reddy Nerella. 2025. DataHacks at PerAnsSumm 2025: LoRA-Driven Prompt Engineering for Perspective Aware Span Identification and Summarization. In Proceedings of the Second Workshop on Patient-Oriented Language Processing (CL4Health), pages 374–379, Albuquerque, New Mexico. Association for Computational Linguistics.
Cite (Informal):
DataHacks at PerAnsSumm 2025: LoRA-Driven Prompt Engineering for Perspective Aware Span Identification and Summarization (Nawander & Nerella, CL4Health 2025)
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PDF:
https://preview.aclanthology.org/fix-sig-urls/2025.cl4health-1.33.pdf