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Treebank-based acquisition of LFG resources for Chinese
In: Guo, Yuqing, van Genabith, Josef and Wang, Haifeng (2007) Treebank-based acquisition of LFG resources for Chinese. In: Lexical Functional Grammar 2007, 28-30 July 2007, California, USA. (2007)
Abstract: This paper presents a method to automatically acquire wide-coverage, robust, probabilistic Lexical-Functional Grammar resources for Chinese from the Penn Chinese Treebank (CTB). Our starting point is the earlier, proofof- concept work of (Burke et al., 2004) on automatic f-structure annotation, LFG grammar acquisition and parsing for Chinese using the CTB version 2 (CTB2). We substantially extend and improve on this earlier research as regards coverage, robustness, quality and fine-grainedness of the resulting LFG resources. We achieve this through (i) improved LFG analyses for a number of core Chinese phenomena; (ii) a new automatic f-structure annotation architecture which involves an intermediate dependency representation; (iii) scaling the approach from 4.1K trees in CTB2 to 18.8K trees in CTB version 5.1 (CTB5.1) and (iv) developing a novel treebank-based approach to recovering non-local dependencies (NLDs) for Chinese parser output. Against a new 200-sentence good standard of manually constructed f-structures, the method achieves 96.00% f-score for f-structures automatically generated for the original CTB trees and 80.01%for NLD-recovered f-structures generated for the trees output by Bikel’s parser.
Keyword: Chinese; lexical functional grammar; Machine translating
URL: http://doras.dcu.ie/15202/
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2
Treebank-based acquisition of a Chinese lexical-functional grammar
In: Burke, Michael, Lam, Olivia, Cahill, Aoife orcid:0000-0002-3519-7726 , Chan, Rowena, O'Donovan, Ruth, Bodomo, Adams, van Genabith, Josef and Way, Andy orcid:0000-0001-5736-5930 (2004) Treebank-based acquisition of a Chinese lexical-functional grammar. In: PACLIC-18 - 18th Pacific Asia Conference on Language, Information and Computation, 8-10 December 2004, Tokyo, Japan. (2004)
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