Shallow Parsing with Conditional Random Fields

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Shallow Parsing with Conditional Random Fields (2003)

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by Fei Sha , Fernando Pereira

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579 - 8 self

BibTeX

@INPROCEEDINGS{Sha03shallowparsing,
    author = {Fei Sha and Fernando Pereira},
    title = {Shallow Parsing with Conditional Random Fields},
    booktitle = {},
    year = {2003},
    pages = {213--220},
    publisher = {}
}

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Abstract

Conditional random fields for sequence labeling offer advantages over both generative models like HMMs and classifiers applied at each sequence position. Among sequence labeling tasks in language processing, shallow parsing has received much attention, with the development of standard evaluation datasets and extensive comparison among methods. We show here how to train a conditional random field to achieve performance as good as any reported base noun-phrase chunking method on the CoNLL task, and better than any reported single model. Improved training methods based on modern optimization algorithms were critical in achieving these results. We present extensive comparisons between models and training methods that confirm and strengthen previous results on shallow parsing and training methods for maximum-entropy models.

Keyphrases

conditional random field shallow parsing conll task sequence labeling offer language processing maximum-entropy model reported base standard evaluation datasets single model much attention modern optimization algorithm previous result training method generative model extensive comparison sequence position present extensive comparison

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