Lise Getoor


2022

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D-REX: Dialogue Relation Extraction with Explanations
Alon Albalak | Varun Embar | Yi-Lin Tuan | Lise Getoor | William Yang Wang
Proceedings of the 4th Workshop on NLP for Conversational AI

Existing research studies on cross-sentence relation extraction in long-form multi-party conversations aim to improve relation extraction without considering the explainability of such methods. This work addresses that gap by focusing on extracting explanations that indicate that a relation exists while using only partially labeled explanations. We propose our model-agnostic framework, D-REX, a policy-guided semi-supervised algorithm that optimizes for explanation quality and relation extraction simultaneously. We frame relation extraction as a re-ranking task and include relation- and entity-specific explanations as an intermediate step of the inference process. We find that human annotators are 4.2 times more likely to prefer D-REX’s explanations over a joint relation extraction and explanation model. Finally, our evaluations show that D-REX is simple yet effective and improves relation extraction performance of strong baseline models by 1.2-4.7%.

2017

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Sparsity and Noise: Where Knowledge Graph Embeddings Fall Short
Jay Pujara | Eriq Augustine | Lise Getoor
Proceedings of the 2017 Conference on Empirical Methods in Natural Language Processing

Knowledge graph (KG) embedding techniques use structured relationships between entities to learn low-dimensional representations of entities and relations. One prominent goal of these approaches is to improve the quality of knowledge graphs by removing errors and adding missing facts. Surprisingly, most embedding techniques have been evaluated on benchmark datasets consisting of dense and reliable subsets of human-curated KGs, which tend to be fairly complete and have few errors. In this paper, we consider the problem of applying embedding techniques to KGs extracted from text, which are often incomplete and contain errors. We compare the sparsity and unreliability of different KGs and perform empirical experiments demonstrating how embedding approaches degrade as sparsity and unreliability increase.

2015

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RELLY: Inferring Hypernym Relationships Between Relational Phrases
Adam Grycner | Gerhard Weikum | Jay Pujara | James Foulds | Lise Getoor
Proceedings of the 2015 Conference on Empirical Methods in Natural Language Processing

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Weakly Supervised Models of Aspect-Sentiment for Online Course Discussion Forums
Arti Ramesh | Shachi H. Kumar | James Foulds | Lise Getoor
Proceedings of the 53rd Annual Meeting of the Association for Computational Linguistics and the 7th International Joint Conference on Natural Language Processing (Volume 1: Long Papers)

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Joint Models of Disagreement and Stance in Online Debate
Dhanya Sridhar | James Foulds | Bert Huang | Lise Getoor | Marilyn Walker
Proceedings of the 53rd Annual Meeting of the Association for Computational Linguistics and the 7th International Joint Conference on Natural Language Processing (Volume 1: Long Papers)

2014

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Understanding MOOC Discussion Forums using Seeded LDA
Arti Ramesh | Dan Goldwasser | Bert Huang | Hal Daumé | Lise Getoor
Proceedings of the Ninth Workshop on Innovative Use of NLP for Building Educational Applications

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Collective Stance Classification of Posts in Online Debate Forums
Dhanya Sridhar | Lise Getoor | Marilyn Walker
Proceedings of the Joint Workshop on Social Dynamics and Personal Attributes in Social Media

2009

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Opinion Graphs for Polarity and Discourse Classification
Swapna Somasundaran | Galileo Namata | Lise Getoor | Janyce Wiebe
Proceedings of the 2009 Workshop on Graph-based Methods for Natural Language Processing (TextGraphs-4)

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Supervised and Unsupervised Methods in Employing Discourse Relations for Improving Opinion Polarity Classification
Swapna Somasundaran | Galileo Namata | Janyce Wiebe | Lise Getoor
Proceedings of the 2009 Conference on Empirical Methods in Natural Language Processing

2004

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Unsupervised Sense Disambiguation Using Bilingual Probabilistic Models
Indrajit Bhattacharya | Lise Getoor | Yoshua Bengio
Proceedings of the 42nd Annual Meeting of the Association for Computational Linguistics (ACL-04)