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Liyan Xu

14 accepted papers

2025

Dense Retrievers Can Fail on Simple Queries: Revealing The Granularity Dilemma of Embeddings

EMNLP 2025

This work stems from an observed limitation of text encoders: embeddings may not be able to recognize fine-grained entities or events within encoded semantics, resulting in failed retrieval even in simple cases. To examine such behaviors, we first introduce a new evaluation dataset, CapRetrieval, in

2025

Exploring Deductive and Inductive Reasoning Capabilities of Large Language Models in Procedural Planning

EMNLP 2025

Deductive and inductive reasoning are fundamental components of human cognition, and in daily life, people often apply these types of reasoning unconsciously. While previous studies have extensively examined the deductive and inductive reasoning abilities of Large Language Models (LLMs) in rule-base

Cited by 0SourcePDFScholar
2025

ScEdit: Script-based Assessment of Knowledge Editing

ACL 2025finding

Knowledge Editing (KE) has gained increasing attention, yet current KE tasks remain relatively simple. Under current evaluation frameworks, many editing methods achieve exceptionally high scores, sometimes nearing perfection. However, few studies integrate KE into real-world application scenarios (e…

2024

Few-Shot Character Understanding in Movies as an Assessment to Meta-Learning of Theory-of-Mind

ICML 2024poster

When reading a story, humans can quickly understand new fictional characters with a few observations, mainly by drawing analogies to fictional and real people they already know. This reflects the few-shot and meta-learning essence of humans' inference of characters' mental states, *i.e.*, theory-of-…

2024

Fine-Grained Modeling of Narrative Context: A Coherence Perspective via Retrospective Questions

ACL 2024long

This work introduces an original and practical paradigm for narrative comprehension, stemming from the characteristics that individual passages within narratives tend to be more cohesively related than isolated.Complementary to the common end-to-end paradigm, we propose a fine-grained modeling of na…

Cited by 2SourcePDFScholar
2024

Identifying Factual Inconsistencies in Summaries: Grounding LLM Inference via Task Taxonomy

EMNLP 2024finding

Factual inconsistencies pose a significant hurdle for the faithful summarization by generative models. While a major direction to enhance inconsistency detection is to derive stronger Natural Language Inference (NLI) models, we propose an orthogonal aspect that underscores the importance of incorpor…

2024

SIG: Speaker Identification in Literature via Prompt-Based Generation

AAAI 2024technical

Identifying speakers of quotations in narratives is an important task in literary analysis, with challenging scenarios including the out-of-domain inference for unseen speakers, and non-explicit cases where there are no speaker mentions in surrounding context. In this work, we propose a simple and…

2023

Towards Open-World Product Attribute Mining: A Lightly-Supervised Approach

ACL 2023long

We present a new task setting for attribute mining on e-commerce products, serving as a practical solution to extract open-world attributes without extensive human intervention. Our supervision comes from a high-quality seed attribute set bootstrapped from existing resources, and we aim to expand th…

2022

RescoreBERT: Discriminative Speech Recognition Rescoring With Bert

ICASSP 2022accepted

Second-pass rescoring is an important component in automatic speech recognition (ASR) systems that is used to improve the outputs from a first-pass decoder by implementing a lattice rescoring or n-best re-ranking. While pretraining with a masked language model (MLM) objective has received great succ…

Cited by 0SourceScholar
2022

Zero-Shot Cross-Lingual Machine Reading Comprehension via Inter-sentence Dependency Graph

AAAI 2022technical

We target the task of cross-lingual Machine Reading Comprehension (MRC) in the direct zero-shot setting, by incorporating syntactic features from Universal Dependencies (UD), and the key features we use are the syntactic relations within each sentence. While previous work has demonstrated effective…

2021

Boosting Cross-Lingual Transfer via Self-Learning with Uncertainty Estimation

EMNLP 2021main

Recent multilingual pre-trained language models have achieved remarkable zero-shot performance, where the model is only finetuned on one source language and directly evaluated on target languages. In this work, we propose a self-learning framework that further utilizes unlabeled data of target langu…