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May 23, 1995474 citationsOpen Access

Text Chunking using Transformation-Based Learning

LRLance RamshawMMMitchell P. Marcus

Key Points

  • The research aims to improve textual interpretation by applying transformation-based learning to text chunking tasks.
  • Transformational learning method applied to part-of-speech tagging.
  • Chunk structure encoded into new tags attached to words.
  • Automatic tests conducted using Treebank-derived data.
  • Achieved approximately 92% recall for baseNP chunks.
  • Achieved approximately 88% recall for more complex chunks partitioning the sentence.
  • Adapting transformation-based learning suggested additional improvements.

Abstract

Eric Brill introduced transformation-based learning and showed that it can do part-of-speech tagging with fairly high accuracy. The same method can be applied at a higher level of textual interpretation for locating chunks in the tagged text, including non-recursive ``baseNP'' chunks. For this purpose, it is convenient to view chunking as a tagging problem by encoding the chunk structure in new tags attached to each word. In automatic tests using Treebank-derived data, this technique achieved recall and precision rates of roughly 92% for baseNP chunks and 88% for somewhat more complex chunks that partition the sentence. Some interesting adaptations to the transformation-based learning approach are also suggested by this application.

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Cite This Study

Ramshaw et al. (1995) studied this question.

synapsesocial.com/papers/6a0ede4ac12540356222bdcbhttps://doi.org/10.48550/arxiv.cmp-lg/9505040
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