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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

Cited by 0SourcePDFScholar
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…

Cited by 0SourcecodeScholar
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 6SourcePDFScholar