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Parsing with PCFGs and automatic f-structure annotation
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In: Cahill, Aoife orcid:0000-0002-3519-7726 , McCarthy, Mairéad, van Genabith, Josef orcid:0000-0003-1322-7944 and Way, Andy orcid:0000-0001-5736-5930 (2002) Parsing with PCFGs and automatic f-structure annotation. In: LFG02 - 7th International Lexical Functional Grammar Conference, 3-5 July, 2002, Athens, Greece. ISBN 1098-6782 (2002)
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Abstract:
The development of large coverage, rich unification- (constraint-) based grammar resources is very time consuming, expensive and requires lots of linguistic expertise. In this paper we report initial results on a new methodology that attempts to partially automate the development of substantial parts of large coverage, rich unification- (constraint-) based grammar resources. The method is based on a treebank resource (in our case Penn-II) and an automatic f-structure annotation algorithm that annotates treebank trees with proto-f-structure information. Based on these, we present two parsing architectures: in our pipeline architecture we first extract a PCFG from the treebank following the method of (Charniak,1996), use the PCFG to parse new text, automatically annotate the resulting trees with our f-structure annotation algorithm and generate proto-f-structures. By contrast, in the integrated architecture we first automatically annotate the treebank trees with f-structure information and then extract an annotated PCFG (A-PCFG) from the treebank. We then use the A-PCFG to parse new text to generate proto-f-structures. Currently our best parsers achieve more than 81% f-score on the 2400 trees in section 23 of the Penn-II treebank and more than 60% f-score on gold-standard proto-f-structures for 105 randomly selected trees from section 23.
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Keyword:
Machine translating; probabilistic context-free grammar
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URL: http://doras.dcu.ie/15346/
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| 162 |
Glue, Underspecification and Translation
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In: Crouch, Dick, Frank, Anette and van Genabith, Josef orcid:0000-0003-1322-7944 (2002) Glue, Underspecification and Translation. In: Bunt, Harry, Muskens, Reinhard and Thijsse, Elias, (eds.) Computing Meaning, Volume 2. Studies in Linguistics and Philosophy, 77 . Kluwer Academic Publishers, Dordrecht, The Netherlands, pp. 165-184. ISBN 978-1402004513 (2002)
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| 163 |
TTS – A Treebank Tool Suite
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In: Cahill, Aoife orcid:0000-0002-3519-7726 and van Genabith, Josef orcid:0000-0003-1322-7944 (2002) TTS – A Treebank Tool Suite. In: The Third International Conference on Language Resources and Evaluation, May 27th--June 2nd, 2002, Las Palmas de Grand Canaria, Spain. (2002)
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| 165 |
Linear logic-based semantics construction for LTAG
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In: Frank, Anette and van Genabith, Josef orcid:0000-0003-1322-7944 (2001) Linear logic-based semantics construction for LTAG. In: The 6th International Lexical-Functional Grammar Conference, LFG'2001, 25-27 June 2001, The University of Hong Kong, Hong Kong. (2001)
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| 166 |
Treebank vs. xbar-based automatic f-structure annotation
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In: van Genabith, Josef orcid:0000-0003-1322-7944 , Frank, Anette and Way, Andy orcid:0000-0001-5736-5930 (2001) Treebank vs. xbar-based automatic f-structure annotation. In: LFG01 - 6th International Lexical Functional Grammar Conference, 25-27 June 2001, Hong Kong. ISBN 1098-6782 (2001)
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| 167 |
Experiments in Structure-Preserving Grammar Compaction
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In: Hepple, Mark and van Genabith, Josef orcid:0000-0003-1322-7944 (2000) Experiments in Structure-Preserving Grammar Compaction. In: 1st Meeting on Speech Technology Transfer, 6-10 Nov 2000, Universidad de Sevilla and Universidad de Granada, Sevilla, Spain. (2000)
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