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<Paper uid="W02-1410">
  <Title>Question Terminology and Representation for Question Type Classication</Title>
  <Section position="6" start_page="5" end_page="5" type="concl">
    <SectionTitle>
5 Conclusions and Future Work
</SectionTitle>
    <Paragraph position="0"> Inthispaper, weshowed that semantic features didnot enhancelexicalfeatures intherepresentation of questions for the purpose of question type classication. While semantic features allow for generalization, they also seemed to do more harm than good in some cases by interacting with lexical features. This indicates that question terminology is strongly lexical indeed, and suggests that enumeration of words which appear in typical, idiomatic question phrases would be more eective than semantics.</Paragraph>
    <Paragraph position="1"> For future work, we are planning to experiment with synonyms. The use of synonyms is another way of increasing the coverage of question terminology;; while semantic features try to achieve it by generalization, synonyms do it by lexical expansion. Our plan is to use the synonyms obtained from very large corpora reported in (Lin, 1998). We are also planning to compare the (lexical and semantic) features we derived automatically in this work with manually selected features. In our previous work, manually selected (lexical) featuresshowedslightlybetterperformanceforthe null training data but no signicant dierence for the test data. We plan to manually pick out semantic as well as lexical features, and apply to the current data.</Paragraph>
  </Section>
class="xml-element"></Paper>