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1
Wide-coverage deep statistical parsing using automatic dependency structure annotation
In: Cahill, Aoife orcid:0000-0002-3519-7726 , Burke, Michael, O'Donovan, Ruth, Riezler, Stefan, van Genabith, Josef orcid:0000-0003-1322-7944 and Way, Andy orcid:0000-0001-5736-5930 (2008) Wide-coverage deep statistical parsing using automatic dependency structure annotation. Computational Linguistics, 34 (1). pp. 81-124. (2008)
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2
Large-scale induction and evaluation of lexical resources from the Penn-II and Penn-III treebanks
In: O'Donovan, Ruth, Burke, Michael, Cahill, Aoife orcid:0000-0002-3519-7726 , van Genabith, Josef and Way, Andy orcid:0000-0001-5736-5930 (2005) Large-scale induction and evaluation of lexical resources from the Penn-II and Penn-III treebanks. Computational Linguistics, 31 (3). pp. 328-365. ISSN 1530-9312 (2005)
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3
Automatic acquisition of Spanish LFG resources from the Cast3LB treebank
In: O'Donovan, Ruth, Cahill, Aoife orcid:0000-0002-3519-7726 , van Genabith, Josef and Way, Andy orcid:0000-0001-5736-5930 (2005) Automatic acquisition of Spanish LFG resources from the Cast3LB treebank. In: the LFG05 Conference, 2005, University of Bergen. (2005)
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4
Strong domain variation and treebank-induced LFG resources
In: Judge, John, Burke, Michael, Cahill, Aoife orcid:0000-0002-3519-7726 , O'Donovan, Ruth, van Genabith, Josef and Way, Andy orcid:0000-0001-5736-5930 (2005) Strong domain variation and treebank-induced LFG resources. In: LFG05 - 10th International Lexical Functional Grammar Conference, 18-20 July 2005, Bergen, Norway. ISBN 1098-6782 (2005)
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5
Large-scale induction and evaluation of lexical resources from the Penn-II treebank
In: O'Donovan, Ruth, Burke, Michael, Cahill, Aoife orcid:0000-0002-3519-7726 , van Genabith, Josef and Way, Andy orcid:0000-0001-5736-5930 (2004) Large-scale induction and evaluation of lexical resources from the Penn-II treebank. In: ACL 2004 - 42nd Annual Meeting of the Association for Computational Linguistics, 21-26 July 2004, Barcelona, Spain. (2004)
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6
Treebank-based acquisition of wide-coverage, probabilistic LFG resources: project overview, results and evaluation
In: Burke, Michael, Cahill, Aoife orcid:0000-0002-3519-7726 , O'Donovan, Ruth, van Genabith, Josef and Way, Andy orcid:0000-0001-5736-5930 (2004) Treebank-based acquisition of wide-coverage, probabilistic LFG resources: project overview, results and evaluation. In: IJCNLP-04 Workshop - The First International Joint Conference on Natural Language Processing, 21 March 2004, Sanya City, Hainan Island, China. (2004)
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7
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)
Abstract: Scaling wide-coverage, constraint-based grammars such as Lexical-Functional Grammars (LFG) (Kaplan and Bresnan, 1982; Bresnan, 2001) or Head-Driven Phrase Structure Grammars (HPSG) (Pollard and Sag, 1994) from fragments to naturally occurring unrestricted text is knowledge-intensive, time-consuming and (often prohibitively) expensive. A number of researchers have recently presented methods to automatically acquire wide-coverage, probabilistic constraint-based grammatical resources from treebanks (Cahill et al., 2002, Cahill et al., 2003; Cahill et al., 2004; Miyao et al., 2003; Miyao et al., 2004; Hockenmaier and Steedman, 2002; Hockenmaier, 2003), addressing the knowledge acquisition bottleneck in constraint-based grammar development. Research to date has concentrated on English and German. In this paper we report on an experiment to induce wide-coverage, probabilistic LFG grammatical and lexical resources for Chinese from the Penn Chinese Treebank (CTB) (Xue et al., 2002) based on an automatic f-structure annotation algorithm. Currently 96.751% of the CTB trees receive a single, covering and connected f-structure, 0.112% do not receive an f-structure due to feature clashes, while 3.137% are associated with multiple f-structure fragments. From the f-structure-annotated CTB we extract a total of 12975 lexical entries with 20 distinct subcategorisation frame types. Of these 3436 are verbal entries with a total of 11 different frame types. We extract a number of PCFG-based LFG approximations. Currently our best automatically induced grammars achieve an f-score of 81.57% against the trees in unseen articles 301-325; 86.06% f-score (all grammatical functions) and 73.98% (preds-only) against the dependencies derived from the f-structures automatically generated for the original trees in 301-325 and 82.79% (all grammatical functions) and 67.74% (preds-only) against the dependencies derived from the manually annotated gold-standard f-structures for 50 trees randomly selected from articles 301-325.
Keyword: Chinese; lexical functional grammar; Machine translating
URL: http://doras.dcu.ie/15299/
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8
Evaluation of an automatic f-structure annotation algorithm against the PARC 700 dependency bank
In: Burke, Michael, Cahill, Aoife orcid:0000-0002-3519-7726 , O'Donovan, Ruth, van Genabith, Josef and Way, Andy orcid:0000-0001-5736-5930 (2004) Evaluation of an automatic f-structure annotation algorithm against the PARC 700 dependency bank. In: LFG'04 - Proceedings of the 9th International Conference on Lexical-Functional Grammar, Christchurch, New Zealand, 10-12 July 2004. ISBN 1098-6782 (2004)
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9
Evaluating automatic LFG f-structure annotation for the Penn-II treebank
In: Burke, Michael, Cahill, Aoife orcid:0000-0002-3519-7726 , McCarthy, Mairéad, O'Donovan, Ruth, van Genabith, Josef and Way, Andy orcid:0000-0001-5736-5930 (2004) Evaluating automatic LFG f-structure annotation for the Penn-II treebank. Research on Language and Computation, 2 (4). pp. 523-547. ISSN 1570-7075 (2004)
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10
Long-distance dependency resolution in automatically acquired wide-coverage PCFG-based LFG approximations
In: 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. (2004)
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11
Treebank-based multilingual unification-grammar development
In: Cahill, Aoife orcid:0000-0002-3519-7726 , Forst, Martin, McCarthy, Mairéad, O'Donovan, Ruth, Rohrer, Christian, van Genabith, Josef orcid:0000-0003-1322-7944 and Way, Andy orcid:0000-0001-5736-5930 (2003) Treebank-based multilingual unification-grammar development. In: ESSLLI 2003 - 15th European Summer School in Logic Language and Information, 18-19 August 2003, Vienna, Austria. (2003)
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