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Robust PCFG-based generation using automatically acquired LFG approximations

Cahill, Aoife and van Genabith, Josef (2006) Robust PCFG-based generation using automatically acquired LFG approximations. In: COLING/ACL 2006 - 21st International Conference on Computational Linguistics and 44th Annual Meeting of the Association for Computational Linguistics, 17-21 July 2006, Sydney, Australia.

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Abstract

We present a novel PCFG-based architecture for robust probabilistic generation based on wide-coverage LFG approximations (Cahill et al., 2004) automatically extracted from treebanks, maximising the probability of a tree given an f-structure. We evaluate our approach using string-based evaluation. We currently achieve coverage of 95.26%, a BLEU score of 0.7227 and string accuracy of 0.7476 on the Penn-II WSJ Section 23 sentences of length ≤20.

Item Type:	Conference or Workshop Item (Paper)
Event Type:	Conference
Refereed:	Yes
Uncontrolled Keywords:	lexical functional grammar; LFG; PCFG;
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/P06/
Copyright Information:	© 2006 Association for Computational Linguistics
Use License:	This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
Funders:	Science Foundation Ireland, SFI 04/BR/CS0370
ID Code:	15269
Deposited On:	10 Mar 2010 13:25 by DORAS Administrator. Last Modified 27 Apr 2010 16:48

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