Xavier Lluís


2014

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A Shortest-path Method for Arc-factored Semantic Role Labeling
Xavier Lluís | Xavier Carreras | Lluís Màrquez
Proceedings of the 2014 Conference on Empirical Methods in Natural Language Processing (EMNLP)

2013

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Joint Arc-factored Parsing of Syntactic and Semantic Dependencies
Xavier Lluís | Xavier Carreras | Lluís Màrquez
Transactions of the Association for Computational Linguistics, Volume 1

In this paper we introduce a joint arc-factored model for syntactic and semantic dependency parsing. The semantic role labeler predicts the full syntactic paths that connect predicates with their arguments. This process is framed as a linear assignment task, which allows to control some well-formedness constraints. For the syntactic part, we define a standard arc-factored dependency model that predicts the full syntactic tree. Finally, we employ dual decomposition techniques to produce consistent syntactic and predicate-argument structures while searching over a large space of syntactic configurations. In experiments on the CoNLL-2009 English benchmark we observe very competitive results.

2009

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A Second-Order Joint Eisner Model for Syntactic and Semantic Dependency Parsing
Xavier Lluís | Stefan Bott | Lluís Màrquez
Proceedings of the Thirteenth Conference on Computational Natural Language Learning (CoNLL 2009): Shared Task

2008

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A Joint Model for Parsing Syntactic and Semantic Dependencies
Xavier Lluís | Lluís Màrquez
CoNLL 2008: Proceedings of the Twelfth Conference on Computational Natural Language Learning