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Knowledge graphs (KGs) of real-world facts about entities and their relationships are useful resources for a variety of natural language processing tasks. However, because knowledge graphs are typically incomplete, it is useful to perform…

Computation and Language · Computer Science 2020-10-28 Dat Quoc Nguyen

Despite the recent popularity of knowledge graph (KG) related tasks and benchmarks such as KG embeddings, link prediction, entity alignment and evaluation of the reasoning abilities of pretrained language models as KGs, the structure and…

Machine Learning · Computer Science 2023-11-14 Nedelina Teneva , Estevam Hruschka

Incorporating factual knowledge into pre-trained language models (PLM) such as BERT is an emerging trend in recent NLP studies. However, most of the existing methods combine the external knowledge integration module with a modified…

Computation and Language · Computer Science 2022-05-06 Yinquan Lu , Haonan Lu , Guirong Fu , Qun Liu

Knowledge graph (KG) representation learning aims to encode entities and relations into dense continuous vector spaces such that knowledge contained in a dataset could be consistently represented. Dense embeddings trained from KG datasets…

Machine Learning · Computer Science 2022-04-18 Tong Yang , Yifei Wang , Long Sha , Jan Engelbrecht , Pengyu Hong

Pre-trained language representation models (PLMs) cannot well capture factual knowledge from text. In contrast, knowledge embedding (KE) methods can effectively represent the relational facts in knowledge graphs (KGs) with informative…

Computation and Language · Computer Science 2020-11-24 Xiaozhi Wang , Tianyu Gao , Zhaocheng Zhu , Zhengyan Zhang , Zhiyuan Liu , Juanzi Li , Jian Tang

Knowledge embeddings (KE) represent a knowledge graph (KG) by embedding entities and relations into continuous vector spaces. Existing methods are mainly structure-based or description-based. Structure-based methods learn representations…

Computation and Language · Computer Science 2023-06-30 Xintao Wang , Qianyu He , Jiaqing Liang , Yanghua Xiao

Knowledge graph (KG) embedding has been used to benefit the diagnosis of animal diseases by analyzing electronic medical records (EMRs), such as notes and veterinary records. However, learning representations to capture entities and…

Artificial Intelligence · Computer Science 2023-09-08 Van Thuy Hoang , Sang Thanh Nguyen , Sangmyeong Lee , Jooho Lee , Luong Vuong Nguyen , O-Joun Lee

Knowledge graphs (KGs) consist of links that describe relationships between entities. Due to the difficulty of manually enumerating all relationships between entities, automatically completing them is essential for KGs. Knowledge Graph…

Computation and Language · Computer Science 2024-06-07 Yusuke Sakai , Hidetaka Kamigaito , Katsuhiko Hayashi , Taro Watanabe

Recently decades have witnessed the empirical success of framing Knowledge Graph (KG) embeddings via language models. However, language model-based KG embeddings are usually deployed as static artifacts, making them difficult to modify…

Computation and Language · Computer Science 2023-12-29 Siyuan Cheng , Ningyu Zhang , Bozhong Tian , Xi Chen , Qingbing Liu , Huajun Chen

In this paper, we present the ``joint pre-training and local re-training'' framework for learning and applying multi-source knowledge graph (KG) embeddings. We are motivated by the fact that different KGs contain complementary information…

Computation and Language · Computer Science 2023-06-06 Zequn Sun , Jiacheng Huang , Jinghao Lin , Xiaozhou Xu , Qijin Chen , Wei Hu

Constructing domain-specific knowledge graphs from unstructured text remains challenging due to heterogeneous entity mentions, long-tail relation distributions, and the absence of standardized schemas. We present LEC-KG, a bidirectional…

Computation and Language · Computer Science 2026-03-02 Yikai Zeng , Yingchao Piao , Changhua Pei , Jianhui Li

Predicting missing facts in a knowledge graph (KG) is a crucial task in knowledge base construction and reasoning, and it has been the subject of much research in recent works using KG embeddings. While existing KG embedding approaches…

Computation and Language · Computer Science 2020-10-09 Xuelu Chen , Muhao Chen , Changjun Fan , Ankith Uppunda , Yizhou Sun , Carlo Zaniolo

Knowledge-intensive tasks pose a significant challenge for Machine Learning (ML) techniques. Commonly adopted methods, such as Large Language Models (LLMs), often exhibit limitations when applied to such tasks. Nevertheless, there have been…

Machine Learning · Computer Science 2024-05-20 Albert Sawczyn , Jakub Binkowski , Piotr Bielak , Tomasz Kajdanowicz

Traditional methods of linking large language models (LLMs) to knowledge bases via the semantic similarity search often fall short of capturing complex relational dynamics. To address these limitations, we introduce AutoKG, a lightweight…

Computation and Language · Computer Science 2023-11-28 Bohan Chen , Andrea L. Bertozzi

Knowledge Graphs (KGs) have gained considerable attention recently from both academia and industry. In fact, incorporating graph technology and the copious of various graph datasets have led the research community to build sophisticated…

Artificial Intelligence · Computer Science 2020-06-03 Bilal Abu-Salih , Marwan Al-Tawil , Ibrahim Aljarah , Hossam Faris , Pornpit Wongthongtham

Recent advancements have witnessed the ascension of Large Language Models (LLMs), endowed with prodigious linguistic capabilities, albeit marred by shortcomings including factual inconsistencies and opacity. Conversely, Knowledge Graphs…

Information Retrieval · Computer Science 2024-07-29 DaiFeng Li , Fan Xu

As large language models (LLMs) continue to grow in size, their abilities to tackle complex tasks have significantly improved. However, issues such as hallucination and the lack of up-to-date knowledge largely remain unresolved. Knowledge…

Artificial Intelligence · Computer Science 2026-03-17 Lihui Liu

A knowledge graph (KG) is a data structure which represents entities and relations as the vertices and edges of a directed graph with edge types. KGs are an important primitive in modern machine learning and artificial intelligence.…

Artificial Intelligence · Computer Science 2021-10-20 Michael R. Douglas , Michael Simkin , Omri Ben-Eliezer , Tianqi Wu , Peter Chin , Trung V. Dang , Andrew Wood

Knowledge graph (KG) entity typing aims at inferring possible missing entity type instances in KG, which is a very significant but still under-explored subtask of knowledge graph completion. In this paper, we propose a novel approach for KG…

Computation and Language · Computer Science 2020-07-22 Yu Zhao , Anxiang Zhang , Ruobing Xie , Kang Liu , Xiaojie Wang

Knowledge graphs (KGs), as structured representations of real world facts, are intelligent databases incorporating human knowledge that can help machine imitate the way of human problem solving. However, KGs are usually huge and there are…

Machine Learning · Computer Science 2023-06-27 Haotian Li , Hongri Liu , Yao Wang , Guodong Xin , Yuliang Wei