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Hengran Zhang

3 accepted papers

2025

Utility-Focused LLM Annotation for Retrieval and Retrieval-Augmented Generation

EMNLP 2025

This paper explores the use of large language models (LLMs) for annotating document utility in training retrieval and retrieval-augmented generation (RAG) systems, aiming to reduce dependence on costly human annotations. We address the gap between retrieval relevance and generative utility by employ

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2023

From Relevance to Utility: Evidence Retrieval with Feedback for Fact Verification

EMNLP 2023short findings

Retrieval-enhanced methods have become a primary approach in fact verification (FV); it requires reasoning over multiple retrieved pieces of evidence to verify the integrity of a claim. To retrieve evidence, existing work often employs off-the-shelf retrieval models whose design is based on the prob…

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2022

CORT: A New Baseline for Comparative Opinion Classification by Dual Prompts

EMNLP 2022finding

Comparative opinion is a common linguistic phenomenon. The opinion is expressed by comparing multiple targets on a shared aspect, e.g., “camera A is better than camera B in picture quality”. Among the various subtasks in opinion mining, comparative opinion classification is relatively less studied.…

Cited by 6Source ↗PDF ↗Scholar ↗