Cahill, Aoife ORCID: 0000-0002-3519-7726, Burke, Michael, O'Donovan, Ruth, van Genabith, Josef and Way, Andy ORCID: 0000-0001-5736-5930 (2004) Long-distance dependency resolution in automatically acquired wide-coverage PCFG-based LFG approximations. In: ACL 2004 - 42nd Annual Meeting of the Association for Computational Linguistics, 21-26 July 2004, Barcelona, Spain.
Abstract
This paper shows how finite approximations of long distance dependency (LDD) resolution can be obtained automatically for wide-coverage, robust, probabilistic Lexical-Functional Grammar (LFG) resources acquired from treebanks. We extract LFG subcategorisation frames and paths linking LDD
reentrancies from f-structures generated automatically
for the Penn-II treebank trees and use them in an LDD resolution algorithm to parse new text. Unlike (Collins, 1999; Johnson, 2002), in our approach resolution of LDDs is done at f-structure (attribute-value structure representations of basic predicate-argument or dependency structure) without empty productions, traces and coindexation in CFG parse trees. Currently our best automatically induced grammars achieve 80.97% f-score for fstructures parsing section 23 of the WSJ part of the
Penn-II treebank and evaluating against the DCU 1051 and 80.24% against the PARC 700 Dependency Bank (King et al., 2003), performing at the same or a slightly better level than state-of-the-art hand-crafted grammars (Kaplan et al., 2004).
Metadata
Item Type: | Conference or Workshop Item (Paper) |
---|---|
Event Type: | Conference |
Refereed: | Yes |
Uncontrolled Keywords: | lexical functional grammar; |
Subjects: | Computer Science > Machine translating |
DCU Faculties and Centres: | Research Initiatives and Centres > National Centre for Language Technology (NCLT) DCU Faculties and Schools > Faculty of Engineering and Computing > School of Computing |
Publisher: | Association for Computational Linguistics |
Official URL: | http://www.aclweb.org/anthology/P/P04/ |
Use License: | This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License |
Funders: | Enterprise Ireland, EI SC/2001/186, Irish Research Council for Science Engineering and Technology |
ID Code: | 15303 |
Deposited On: | 15 Mar 2010 11:27 by DORAS Administrator . Last Modified 25 Jan 2019 11:42 |
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