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LLM-based conversational agents still struggle to maintain coherent, personalized interaction over many sessions: fixed context windows limit how much history can be kept in view, and most external memory approaches trade off between coarse…

Computation and Language · Computer Science 2025-12-12 Sizhe Zhou , Jiawei Han

Query-focused summarization (QFS) is a fundamental task in natural language processing with broad applications, including search engines and report generation. However, traditional approaches assume the availability of relevant documents,…

Computation and Language · Computer Science 2024-08-21 Weijia Zhang , Jia-Hong Huang , Svitlana Vakulenko , Yumo Xu , Thilina Rajapakse , Evangelos Kanoulas

Citizen reporting platforms help the public and authorities stay informed about sexual harassment incidents. However, the high volume of data shared on these platforms makes reviewing each individual case challenging. Therefore, a…

Computation and Language · Computer Science 2026-04-20 Garima Chhikara , Anurag Sharma , V. Gurucharan , Kripabandhu Ghosh , Abhijnan Chakraborty

Joint-event-extraction, which extracts structural information (i.e., entities or triggers of events) from unstructured real-world corpora, has attracted more and more research attention in natural language processing. Most existing works do…

Computation and Language · Computer Science 2020-10-15 Yue Wang , Zhuo Xu , Lu Bai , Yao Wan , Lixin Cui , Qian Zhao , Edwin R. Hancock , Philip S. Yu

Event extraction identifies the central aspects of events from text. It supports event understanding and analysis, which is crucial for tasks such as informed decision-making in emergencies. Therefore, it is necessary to develop automated…

Computation and Language · Computer Science 2026-04-24 Praval Sharma , Ashok Samal , Leen-Kiat Soh , Deepti Joshi

Entity summarization is the problem of computing an optimal compact summary for an entity by selecting a size-constrained subset of triples from RDF data. Entity summarization supports a multiplicity of applications and has led to fruitful…

Information Retrieval · Computer Science 2020-03-26 Qingxia Liu , Gong Cheng , Kalpa Gunaratna , Yuzhong Qu

Event-based semantic segmentation (ESS) is a fundamental yet challenging task for event camera sensing. The difficulties in interpreting and annotating event data limit its scalability. While domain adaptation from images to event data can…

Computer Vision and Pattern Recognition · Computer Science 2024-05-09 Lingdong Kong , Youquan Liu , Lai Xing Ng , Benoit R. Cottereau , Wei Tsang Ooi

Event mentions in text correspond to real-world events of varying degrees of granularity. The task of subevent detection aims to resolve this granularity issue, recognizing the membership of multi-granular events in event complexes. Since…

Computation and Language · Computer Science 2021-09-15 Haoyu Wang , Hongming Zhang , Muhao Chen , Dan Roth

Despite extensive recent advances in summary generation models, evaluation of auto-generated summaries still widely relies on single-score systems insufficient for transparent assessment and in-depth qualitative analysis. Towards bridging…

Computation and Language · Computer Science 2022-10-26 Ben Schaper , Christopher Lohse , Marcell Streile , Andrea Giovannini , Richard Osuala

We aim to renew interest in a particular multi-document summarization (MDS) task which we call AgreeSum: agreement-oriented multi-document summarization. Given a cluster of articles, the goal is to provide abstractive summaries that…

Computation and Language · Computer Science 2021-06-07 Richard Yuanzhe Pang , Adam D. Lelkes , Vinh Q. Tran , Cong Yu

Event sequences (ESs) arise in many practical domains including finance, retail, social networks, and healthcare. In the context of machine learning, event sequences can be seen as a special type of tabular data with annotated timestamps.…

Extractive summarization aims to form a summary by directly extracting sentences from the source document. Existing works mostly formulate it as a sequence labeling problem by making individual sentence label predictions. This paper…

Computation and Language · Computer Science 2023-05-12 Haopeng Zhang , Xiao Liu , Jiawei Zhang

Managing extensive context remains a critical bottleneck for Large Language Models (LLMs), particularly in applications like long-document question answering and autonomous agents where lengthy inputs incur high computational costs and…

Computation and Language · Computer Science 2026-01-06 Yiqing Zhou , Yu Lei , Shuzheng Si , Qingyan Sun , Wei Wang , Yifei Wu , Hao Wen , Gang Chen , Fanchao Qi , Maosong Sun

The core challenge faced by multi-document summarization is the complexity of relationships among documents and the presence of information redundancy. Graph clustering is an effective paradigm for addressing this issue, as it models the…

Computation and Language · Computer Science 2025-08-01 Yongbing Zhang , Fang Nan , Shengxiang Gao , Yuxin Huang , Kaiwen Tan , Zhengtao Yu

Event grounding aims at linking mention references in text corpora to events from a knowledge base (KB). Previous work on this task focused primarily on linking to a single KB event, thereby overlooking the hierarchical aspects of events.…

Computation and Language · Computer Science 2023-02-09 Jiefu Ou , Adithya Pratapa , Rishubh Gupta , Teruko Mitamura

Recent studies have investigated utilizing Knowledge Graphs (KGs) to enhance Quesetion Answering (QA) performance of Large Language Models (LLMs), yet structured KG verbalization remains challengin. Existing methods, such as triple-form or…

Computation and Language · Computer Science 2024-10-10 Sungho Ko , Hyunjin Cho , Hyungjoo Chae , Jinyoung Yeo , Dongha Lee

Event extraction (EE) is the task of identifying interested event mentions from text. Conventional efforts mainly focus on the supervised setting. However, these supervised models cannot generalize to event types out of the pre-defined…

Computation and Language · Computer Science 2022-11-15 Hongming Zhang , Wenlin Yao , Dong Yu

Event Coreference Resolution (ECR) as a pairwise mention classification task is expensive both for automated systems and manual annotations. The task's quadratic difficulty is exacerbated when using Large Language Models (LLMs), making…

Computation and Language · Computer Science 2024-04-16 Shafiuddin Rehan Ahmed , George Arthur Baker , Evi Judge , Michael Regan , Kristin Wright-Bettner , Martha Palmer , James H. Martin

Prior work has proposed effective methods to learn event representations that can capture syntactic and semantic information over text corpus, demonstrating their effectiveness for downstream tasks such as script event prediction. On the…

Artificial Intelligence · Computer Science 2020-06-25 Xiao Ding , Kuo Liao , Ting Liu , Zhongyang Li , Junwen Duan

Event Detection (ED) is an important task in natural language processing. In the past few years, many datasets have been introduced for advancing ED machine learning models. However, most of these datasets are under-explored because not…

Computation and Language · Computer Science 2022-04-27 Wenlong Zhang , Bhagyashree Ingale , Hamza Shabir , Tianyi Li , Tian Shi , Ping Wang