Heng Ji

Joint Event Extraction via Structured Prediction with Global Features

Traditional approaches to the task of ACE event extraction usually rely on sequential pipelines with multiple stages, which suffer from error propagation since event triggers and arguments are… (More)

Overview of the TAC 2010 Knowledge Base Population Track

Heng Ji, Ralph Grishman, Hoa Trang Dang
2010

In this paper we give an overview of the Knowledge Base Population (KBP) track at TAC 2010. The main goal of KBP is to promote research in discovering facts about entities and expanding a structured… (More)

Knowledge Base Population: Successful Approaches and Challenges

In this paper we give an overview of the Knowledge Base Population (KBP) track at the 2010 Text Analysis Conference. The main goal of KBP is to promote research in discovering facts about entities… (More)

Refining Event Extraction through Cross-Document Inference

We apply the hypothesis of “One Sense Per Discourse” (Yarowsky, 1995) to information extraction (IE), and extend the scope of “discourse” from one single document to a cluster of topically-related… (More)

New Tools for Web-Scale N-grams

Dekang Lin, Kenneth Ward Church, +9 authors Sushant Narsale
LREC
2010

While the web provides a fantastic linguistic resource, col lecting and processing data at web-scale is beyond the reach of most academic laboratories. Previous research has relied on search engin es… (More)

A Dependency-Based Neural Network for Relation Classification

Yang Liu, Furu Wei, Sujian Li, Heng Ji, Ming Zhou, Houfeng Wang
ACL
2015

Previous research on relation classification has verified the effectiveness of using dependency shortest paths or subtrees. In this paper, we further explore how to make full use of the combination… (More)

Incremental Joint Extraction of Entity Mentions and Relations

Qi Li, Heng Ji
ACL
2014

We present an incremental joint framework to simultaneously extract entity mentions and relations using structured perceptron with efficient beam-search. A segment-based decoder based on the idea of… (More)

Overview of TAC-KBP 2014 Entity Discovery and Linking Tasks

Heng Ji, Joel Nothman, Ben Hachey
2015

In this paper we give an overview of the Entity Discovery and Linking tasks at the Knowledge Base Population track at TAC 2014. In this year we introduced a new end-to-end English entity discovery… (More)

Label Noise Reduction in Entity Typing by Heterogeneous Partial-Label Embedding

Xiang Ren, Wenqi He, Meng Qu, Clare R. Voss, Heng Ji, Jiawei Han
KDD
2016

Current systems of fine-grained entity typing use distant supervision in conjunction with existing knowledge bases to assign categories (type labels) to entity mentions. However, the type labels so… (More)

Overview of TAC-KBP2015 Tri-lingual Entity Discovery and Linking

Heng Ji, Joel Nothman, Ben Hachey, Radu Florian
TAC
2015

In this paper we give an overview of the Tri-lingual Entity Discovery and Linking task at the Knowledge Base Population (KBP) track at TAC2015. In this year we introduced a new end-to-end Tri-lingual… (More)

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