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Error-Aware Probabilistic Parsing

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Given the human propensity to err, a parser must be able to produce accurate analyses for sentences which are deviant according to human standards, yet which we routinely interpret correctly. State-of-the- art probabilistic parsers are generally robust to errors, and they will return analyses for most ungrammatical sentences. However, these robust analyses are not necessarily correct because they do not always reflect the meanings of the ill-formed sentences. I present a two- stage “error-aware” probabilistic parsing architecture which uses two versions of a probabilistic parser, one trained on a normal treebank and the other trained on an automatically created ungrammatical version of the original treebank. A binary classifier is used to decide which version to employ. I present the results of experiments carried out using the “error-aware” probabilistic parsing architecture and the Penn Treebank. I also present the results of experiments carried out with various grammatical/ungrammatical classifiers and the BNC .

This talk is part of the NLIP Seminar Series series.

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