116 research outputs found
Graph-Cut-Based Anaphoricity Determination for Coreference Resolution
Recent work has shown that explicitly identifying and filtering non-anaphoric mentions prior to coreference resolution can improve the performance of a coreference system. We present a novel approach to this task of anaphoricity determination based on graph cuts, and demonstrate its superiority to competing approaches by comparing their effectiveness in improving a learning-based coreference system on the ACE data sets.
Enhancing Coreference Clustering
Proceedings of the Second Workshop on Anaphora Resolution
(WAR II).
Editor: Christer Johansson.
NEALT Proceedings Series, Vol. 2 (2008), 31-40.
© 2008 The editors and contributors.
Published by
Northern European Association for Language
Technology (NEALT)
http://omilia.uio.no/nealt .
Electronically published at
Tartu University Library (Estonia)
http://hdl.handle.net/10062/7129
Model-based annotation of coreference
Humans do not make inferences over texts, but over models of what texts are
about. When annotators are asked to annotate coreferent spans of text, it is
therefore a somewhat unnatural task. This paper presents an alternative in
which we preprocess documents, linking entities to a knowledge base, and turn
the coreference annotation task -- in our case limited to pronouns -- into an
annotation task where annotators are asked to assign pronouns to entities.
Model-based annotation is shown to lead to faster annotation and higher
inter-annotator agreement, and we argue that it also opens up for an
alternative approach to coreference resolution. We present two new coreference
benchmark datasets, for English Wikipedia and English teacher-student
dialogues, and evaluate state-of-the-art coreference resolvers on them.Comment: To appear in LREC 202
Joint Learning for Coreference Resolution with Markov Logic
Pairwise coreference resolution models must merge pairwise coreference decisions to generate final outputs. Traditional merging methods adopt different strategies such as the bestfirst method and enforcing the transitivity constraint, but most of these methods are used independently of the pairwise learning methods as an isolated inference procedure at the end. We propose a joint learning model which combines pairwise classification and mention clustering with Markov logic. Experimental results show that our joint learning system outperforms independent learning systems. Our system gives a better performance than all the learning-based systems from the CoNLL-2011 shared task on the same dataset. Compared with the best system from CoNLL-2011, which employs a rule-based method, our system shows competitive performance.
Joint Anaphoricity Detection and Coreference Resolution with Constrained Latent Structures
International audienceThis paper introduces a new structured model for learninganaphoricity detection and coreference resolution in a jointfashion. Specifically, we use a latent tree to represent the fullcoreference and anaphoric structure of a document at a globallevel, and we jointly learn the parameters of the two modelsusing a version of the structured perceptron algorithm.Our joint structured model is further refined by the use ofpairwise constraints which help the model to capture accuratelycertain patterns of coreference. Our experiments on theCoNLL-2012 English datasets show large improvements inboth coreference resolution and anaphoricity detection, comparedto various competing architectures. Our best coreferencesystem obtains a CoNLL score of 81:97 on gold mentions,which is to date the best score reported on this setting
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