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<Paper uid="W04-2012">
  <Title>Answer Validation by Keyword Association</Title>
  <Section position="13" start_page="5" end_page="5" type="concl">
    <SectionTitle>
8 Conclusion and Future Work
</SectionTitle>
    <Paragraph position="0"> In this paper, we proposed an approach of answer validation based on the strengths of lexical association between the keywords extracted from a question sentence and each answer candidate. The proposed answer validation process is decomposed into two steps: the first is to extract appropriate keywords from a question sentence using word features and the strength of lexical association, while the second is to estimate the strength of the association between the keywords and an answer candidate based on the hits of search engines. In the result of experimental evaluation, we showed that a good proportion (79%) of the multiple-choice quiz &amp;quot;Who wants to be a millionaire&amp;quot; can be solved by the proposed method.</Paragraph>
    <Paragraph position="1"> Future works include the followings: first, we are planning to examine whether the syntactic structures of the question sentence is useful for selecting appropriate keywords from the question sentence. Secondly, it is interesting to see whether the keyword selection method proposed in this paper is also effective for other applications such as answer candidate collection of the whole question answering process.</Paragraph>
  </Section>
class="xml-element"></Paper>