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Document-level relation extraction is a complex human process that requires logical inference to extract relationships between named entities in text. Existing approaches use graph-based neural models with words as nodes and edges as…

Computation and Language · Computer Science 2019-09-04 Fenia Christopoulou , Makoto Miwa , Sophia Ananiadou

Entity embeddings, which represent different aspects of each entity with a single vector like word embeddings, are a key component of neural entity linking models. Existing entity embeddings are learned from canonical Wikipedia articles and…

Computation and Language · Computer Science 2021-06-17 Feng Hou , Ruili Wang , Jun He , Yi Zhou

Relation extraction (RE) aims to identify the semantic relations between named entities in text. Recent years have witnessed it raised to the document level, which requires complex reasoning with entities and mentions throughout an entire…

Computation and Language · Computer Science 2020-09-23 Difeng Wang , Wei Hu , Ermei Cao , Weijian Sun

Relation triple extraction, which outputs a set of triples from long sentences, plays a vital role in knowledge acquisition. Large language models can accurately extract triples from simple sentences through few-shot learning or fine-tuning…

Computation and Language · Computer Science 2024-04-16 Zepeng Ding , Wenhao Huang , Jiaqing Liang , Deqing Yang , Yanghua Xiao

The growing demand for structured knowledge has led to great interest in relation extraction, especially in cases with limited supervision. However, existing distance supervision approaches only extract relations expressed in single…

Computation and Language · Computer Science 2017-08-16 Chris Quirk , Hoifung Poon

This paper explores entity embedding effectiveness in ad-hoc entity retrieval, which introduces distributed representation of entities into entity retrieval. The knowledge graph contains lots of knowledge and models entity semantic…

Information Retrieval · Computer Science 2019-08-29 Zhenghao Liu , Chenyan Xiong , Maosong Sun , Zhiyuan Liu

Though language model text embeddings have revolutionized NLP research, their ability to capture high-level semantic information, such as relations between entities in text, is limited. In this paper, we propose a novel contrastive learning…

Computation and Language · Computer Science 2023-10-10 Christos Theodoropoulos , James Henderson , Andrei C. Coman , Marie-Francine Moens

Learning representations for knowledge base entities and concepts is becoming increasingly important for NLP applications. However, recent entity embedding methods have relied on structured resources that are expensive to create for new…

Computation and Language · Computer Science 2018-07-11 Denis Newman-Griffis , Albert M. Lai , Eric Fosler-Lussier

Neural network based approaches for sentence relation modeling automatically generate hidden matching features from raw sentence pairs. However, the quality of matching feature representation may not be satisfied due to complex semantic…

Computation and Language · Computer Science 2016-04-01 Peng Li , Heng Huang

Relation extraction is the task of identifying relation instance between two entities given a corpus whereas Knowledge base modeling is the task of representing a knowledge base, in terms of relations between entities. This paper proposes…

Computation and Language · Computer Science 2020-11-20 Xiaoyu Chen , Rohan Badlani

Distant supervision for relation extraction is an efficient method to reduce labor costs and has been widely used to seek novel relational facts in large corpora, which can be identified as a multi-instance multi-label problem. However,…

Computation and Language · Computer Science 2018-12-27 Changsen Yuan , Heyan Huang , Chong Feng , Xiao Liu , Xiaochi Wei

Deep neural networks for machine comprehension typically utilizes only word or character embeddings without explicitly taking advantage of structured linguistic information such as constituency trees and dependency trees. In this paper, we…

Computation and Language · Computer Science 2017-09-04 Rui Liu , Junjie Hu , Wei Wei , Zi Yang , Eric Nyberg

In this study, a novel method for extracting named entities and relations from unstructured text based on the table representation is presented. By using contextualized word embeddings, the proposed method computes representations for…

Computation and Language · Computer Science 2022-01-28 Youmi Ma , Tatsuya Hiraoka , Naoaki Okazaki

Document-level relation extraction is a challenging task which requires reasoning over multiple sentences in order to predict relations in a document. In this paper, we pro-pose a joint training frameworkE2GRE(Entity and Evidence Guided…

Computation and Language · Computer Science 2020-08-28 Kevin Huang , Guangtao Wang , Tengyu Ma , Jing Huang

We present a joint model for entity-level relation extraction from documents. In contrast to other approaches - which focus on local intra-sentence mention pairs and thus require annotations on mention level - our model operates on entity…

Computation and Language · Computer Science 2021-12-06 Markus Eberts , Adrian Ulges

We study methods for learning sentence embeddings with syntactic structure. We focus on methods of learning syntactic sentence-embeddings by using a multilingual parallel-corpus augmented by Universal Parts-of-Speech tags. We evaluate the…

Computation and Language · Computer Science 2019-10-28 Chen Liu , Anderson de Andrade , Muhammad Osama

We present a novel end-to-end neural model to extract entities and relations between them. Our recurrent neural network based model captures both word sequence and dependency tree substructure information by stacking bidirectional…

Computation and Language · Computer Science 2016-06-09 Makoto Miwa , Mohit Bansal

We consider the problem of Recognizing Textual Entailment within an Information Retrieval context, where we must simultaneously determine the relevancy as well as degree of entailment for individual pieces of evidence to determine a yes/no…

Computation and Language · Computer Science 2016-06-24 Petr Baudis , Silvestr Stanko , Jan Sedivy

One of the most remarkable properties of word embeddings is the fact that they capture certain types of semantic and syntactic relationships. Recently, pre-trained language models such as BERT have achieved groundbreaking results across a…

Computation and Language · Computer Science 2019-12-02 Zied Bouraoui , Jose Camacho-Collados , Steven Schockaert

Given the recent advances and progress in Natural Language Processing (NLP), extraction of semantic relationships has been at the top of the research agenda in the last few years. This work has been mainly motivated by the fact that…

Computation and Language · Computer Science 2020-04-30 Epaminondas Kapetanios , Vijayan Sugumaran , Anastassia Angelopoulou