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<Paper uid="W00-1307">
  <Title>A Uniform Method of Grammar Extraction and Its Applications</Title>
  <Section position="7" start_page="60" end_page="60" type="concl">
    <SectionTitle>
5 Conclusion
</SectionTitle>
    <Paragraph position="0"> We have presented a system for grammar extraction that produces an LTAG from a Treebank. The output produced by the system has been used in many NLP tasks, two of which are discussed in the paper. In the first task, by comparing the XTAG grammar with a Treebank grammar produced by LexTract, we estimate that the XTAG grammar covers 97.2% of template tokens in the English Treebank. We plan to use the Treebank grammar to improve the coverage of the XTAG grammar. We have also found constructions that are covered in the XTAG grammar but do not appear in the Treebank. In the second task, LexTract converts the Treebank into a format that can be used to train Supertaggers, and the Supertagging accuracy is compatible to, if not better than, the ones based on other conversion algorithms. For future work, we plan to use derivation trees to train LTAG parsers directly and use LexTract to add semantic information to the Penn Treebank.</Paragraph>
  </Section>
class="xml-element"></Paper>