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A Corpus-based Probabilistic Grammar with Only Two Non-terminals (1995)
| Venue: | Proceedings Fourth International Workshop on Parsing Technologies |
| Citations: | 88 - 3 self |
BibTeX
@INPROCEEDINGS{Sekine95acorpus-based,
author = {Satoshi Sekine and Ralph Grishman},
title = {A Corpus-based Probabilistic Grammar with Only Two Non-terminals},
booktitle = {Proceedings Fourth International Workshop on Parsing Technologies},
year = {1995},
pages = {216--223}
}
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Abstract
The availability of large, syntactically-bracketed corpora such as the Penn Tree Bank affords us the opportunity to automatically build or train broad-coverage grammars, and in particular to train probabilistic grammars. A number of recent parsing experiments have also indicated that grammars whose production probabilities are dependent on the context can be more effective than context-free grammars in selecting a correct parse. To make maximal use of context, we have automatically constructed, from the Penn Tree Bank version 2, a grammar in which the symbols S and NP are the only real nonterminals, and the other non-terminals or grammatical nodes are in effect embedded into the right-hand-sides of the S and NP rules. For example, one of the rules extracted from the tree bank would be S -? NP VBX JJ CC VBX NP [1] (where NP is a non-terminal and the other symbols are terminals -- part-of-speech tags of the Tree Bank). The most common structure in the Tree Bank associated with this expan...
Keyphrases
tree bank corpus-based probabilistic grammar common structure correct parse penn tree bank version maximal use syntactically-bracketed corpus context-free grammar penn tree bank affords terminal part-of-speech tag grammatical node probabilistic grammar production probability real nonterminals np rule broad-coverage grammar
